Category: ECO254 0 ECO254 1 / 151 If an hypothesis talk about no difference then we have ______ Check 2 / 151 _______ is the distribution that make use of discrete varaibles and combinatorial analysis Multinomial distribution All of the above Hyper geometric distribution Binomial distribution 3 / 151 Uniform distribution can also be seen as a statistical distribution in which every possible outcome has ______ a clearer chances an equal chance a chances either an equal chance or unequal chnace 4 / 151 Application of Simple Linear regression analysis is the way by which we subject different data to statistical analysis by using computer software such strata, e-view to analyse and predict the relationship between the dependent variable and Check 5 / 151 Chi-square goodness of fit test is applied when you have one categorical varaible from a ____ population. Double Single A and B All of the above 6 / 151 Hypothesis may be directional or ___ Check 7 / 151 A discrete probability distribution is a probability characterized by a probability ______ Check 8 / 151 One explanatory varaible is called a ______ Simple Regression Multiple Regression Linear All of the above 9 / 151 Null hypothesis are usually denoted with the symbol _____ Check 10 / 151 The standard deviation of the sampling distribution is known as the _________ Check 11 / 151 One of the uses of statistics is to make a ______ None of the above Calculation Decisive decision true population of data 12 / 151 The distribution like the binomial and poisson distribution is a probability that makes use of ______ variables Check 13 / 151 A graph for frequency distribution can be supplied by a _____ Histogram A and B All of the above Polygon graph 14 / 151 _____ test ia a collection of test statistics that is used for the analysis of stratified categorical data Yate's Correction test A and B None of the above Pearson's test 15 / 151 In an experimental research, the scientist may have two groups, an experimental group and a ______ Check 16 / 151 A type of photocopier has a paper Jam on average once every 3000 copies. What is the probability that there will be more than two jams in a 3000 copy run? None of the above 7 3 2 17 / 151 Hypotheses are formulated and different types of statistical tests are carried out in order to make a reasonable ____ Check 18 / 151 Three out of the 9 finalists in an African American beauty competition are Nigerians. If two winner are to be selected, find the probability that; at least one of them would be a Nigerian. All of the above 0.58 0.33 0.42 19 / 151 _____ s the value of a statistic obtain vary from one sample to another even when equal samples are selected from the same population using the same procedure Check 20 / 151 The calculation of sampling distribution is a step forward to look at different ways of obtaining distribution of proportion process of _____ data None of the above Pooled Sample Uniform 21 / 151 _____ is used to determine all reasonably likely values of the difference between two population means None of the above Variance analysis Mean analysis Intervals analysis 22 / 151 ______ is a random varaibles that we assigns a probability to each possible value Continuous random varaibles Fixed random varaibles Discrete random varaibles All of the above 23 / 151 Calcualte the mean of a uniform disribution given that (a+b) = 7/128 and b= 6.40 while a= 2.10 0.16 None of the above 0.016 16 24 / 151 In a statistics examination for secondary students, the 12 females used in the study has a mean score of 71 and a variance of 22 while the 10 males used has a mean score of 77 and a variance of 8. Calcualte the confidence intervals at 99% level of significance. 5.08 None of the above 4.02 5.78 25 / 151 Null hypothesis is denoted as ______ H1 H2 Ho None of the above 26 / 151 A ___ is considered to be known when we know the probability distribution f(x) (probability function or density function) of the associated random variable x Check 27 / 151 _________ is a test that allows us to compare a collection of categorical data with the theoretical distribution Check 28 / 151 A ________ can said to be a measurement of how expectations are compared to results. Check 29 / 151 The t statistics was introduced in ________ year 1988 1998 1901 1908 30 / 151 ______ test is used when testing for independence in a contingency table None of the above Pearson's Chi-square F test Yaty Chi- square 31 / 151 One of the uses of statistics is to make a decisive ________ Check 32 / 151 Regression analysis is widely used for ______ and ______ Prediction and Calculation Prediction and Forecasting Calculation and Forecasting Forecasting and Analysis 33 / 151 In hypotheses testing some errors are committed in the quest for taking a good __ Check 34 / 151 The mean mark of students in statistics test is 68 with standard deviation of 30. If samples consisting of 64 students each are obtained from the students population of 6,000. Calculate the standard deviation of the sampling distribution of mean if sampling is done with replacement A and B None of the above 2.5 2.2 35 / 151 _is an approach use in ANOVA (that is a region analysis involving two qualitative factors) to detect whether the factor variables are additively related to the expected value of the response variables Check 36 / 151 In Probability and Statistics, a probability distribution assigns a probability to each measurable sunset of the possible outsomes of a ______ probability experiment inference statistics None of the above random experiment 37 / 151 An hypotheses is formulated with the basic idea of nulifying the hypotheses and rendering the hypothese _____ Check 38 / 151 F Test was coined by George, W. Snedeaor but he used it to honour Sir Ronald A. Fisher and Fisher initially developed the statistics as the variance ratio in _____ Check 39 / 151 The numerical value of the decision rule is called _____ Criterion of Significance All of the above A and B Level of Significance 40 / 151 Regression analysis is widely used for ____ and forecasting Check 41 / 151 Type 2 error is a situation when one accepts the hypothesis when it should be Check 42 / 151 In quality control, one might demand that the probability of a 800g package containing between 790g and 810g should be not less than _______ 0.48 0.34 None of the above 0.98 43 / 151 If the aim of an hypothesis is to conclude that one item is better or less than the other then we have ______ Check 44 / 151 Probabilities associated with individual values of x cannot be _______ or greater than 1 since this has no meaning Check 45 / 151 Confidence interval is used to determine all reasonably likely values of the difference between two ___________ Check 46 / 151 Any assumptions made with the sole purpose of rendering the statistical hypothesis insignificant is called a ______ Check 47 / 151 If the parameters are under estimated, the sampling errors are ______ Check 48 / 151 A _____ can said to be a measurement of how expectations are compared to results. F test None of the above T test Chi-Square analysis result 49 / 151 _____ is a statistics process for estimating the relationship among varaibles. All of the above Regression analysis Chi-Square A and B 50 / 151 Given Y = a + Bx1 + Cx2. The equation above is an example of _____ Simple regression model Multiple regression model A and B 51 / 151 Regression analysis is a statistical process for estimating the relationship among ______ Check 52 / 151 A ______ Probability distribution is a probability distribution that has a probability density function Variable Continuous Fixed All of the above 53 / 151 _____ test is a statistical test that is applied to categorical data to investigate how likely it is that any observed difference betweeen the sets arose by chance. Chi-Square None of the above F T 54 / 151 A Company short lists 12 applicants for an interview out of which 4 are men. If there are only five vacant posts to be filled, find the probability that the list of successful applicant contains all women 0.01 None of the above 0.02 0.42 55 / 151 If the 0.05 level of significance is to be used in a two tailed test, the 0.05 level is shared between the two ends of the tails giving 0.025 or __________ Check 56 / 151 Simple Regression analysis is also called ______ Regression equation A and B None of the above Linear Non-Linear 57 / 151 A coin also has a uniform distribution because the _____ in a coin toss is the same Probability of getting either heads or tails Probability of head Probability of getting either heads and tails All of the above 58 / 151 An __________ can be defined as any statistical test in which the test statistics has an F distribution under a null hypothesis situation and it is usually used when comparing statistical models in a data set so that we can identify the mode that best fits the population where the date were sampled Check 59 / 151 In the case of one explanatory variable is called ___________ linear regression. Check 60 / 151 Matching is carried out by identifying pairs of values consisting of one observation from each of the two _______ Check 61 / 151 Three out of the 9 finalists in an African American beauty competition are Nigerians. If two winner are to be selected, find the probability that only one of them would be a Nigeria. 0.7 0.5 0.05 0.2 62 / 151 __________ are collections of test statistics that is used for the analysis of stratified categorical data Check 63 / 151 Ho in hypothesis testing is ________ hypothesis zero None of the above Help hypohesis 1 64 / 151 A deck of cards has a uniform distribution because the likelihood of drawing a heart, a club, a diamond or spade is equally _____ None of the above Likely Alike Unlikely 65 / 151 ______ is a tentative statement in a statistical analysis None of the above Confidence interval Tests Variables 66 / 151 Given Z = Bo + B1X1 + B2X2. From the equation above, the explanatory variables are _______ B1X1 B2X2 Bo All of the above 67 / 151 In a statistics examination for secondary students, the 23 females used in the study has a mean score of 81 and a variance of 12 while the 20 males used has a mean score of 78 and a variance of 10. Do you think gender have an effect on the score of there secondary student at 99% level significance? None of the above 2.44 2.8 2.7 68 / 151 When a random varaible takes values from a continuous probabilities that are non zero, this can only refer to _____ Monthly interval All of the above Infinite intervals Quarterly Data 69 / 151 Generating a data is important in _______ analysis T test F test Regression All of the above 70 / 151 Any assumptions made with the sole purpose of rendering the statistical hypothesis significant is called a _______ Check 71 / 151 ______ is a type of probability distribution in which all outcomes are equally alike Distribution All of the above Finite Distribution Continuous distribution 72 / 151 A _____ is considered to be known when we know the probability distribution None of the above A and B Sampling Parameters 73 / 151 When a die is thrown once, the probability of getting one is _____ None of the above 42496 42403 42434 74 / 151 _____ test is a statistical test that is used on paired nominal data Cochram Mantel Turkey's test Mc Nemar's All of the above 75 / 151 ______ is the values of a population parameter and that of the corresponding statistic that are not always the same Check 76 / 151 ______ is a statistical test that is applied to categorical data to investigate how likely it is that any observed difference between the sets arose by chance and it is good for unpaired data that can be seen from large samples. Check 77 / 151 sampling where each member cannot be chosen more than once is called sampling _____ Check 78 / 151 The t statistic was introduced by Willian Sealey Gosset a ______ working for Guinness Brewery in Dublin Finland British Nigerian Businessman None of the above 79 / 151 Alternative hypothesis is denoted as ______ H1 Ho H2 None of the above 80 / 151 The ____ distribution is a family of continuous probability distributions defined on the interval of 0 and 1 parameterized by two positive shape parameters Uniform None of the above Cauchy Gamma 81 / 151 When an equation is in a general term in a multinomial expansion it is called ____ Hyper- geometric distribution Multinomial distribution None of the above Binomial distribution 82 / 151 sampling error (E) is defined as the difference between the sample statistic (s) and the _____ being estimated Check 83 / 151 The one tailed test gets its name from testing the area under one of the tails (sides) of a _______ Check 84 / 151 The Cauchy distribution is often used in statistics as the canonical example of pathological distribution since both its mean and its variance are ______ Defined Undefined Analysed All of the above 85 / 151 Hi in hypothesis testing is _______ hypothesis 1 None of the above Hypothsis i hypothesis 2 86 / 151 __________ limit are the end points of the confidence interval. Check 87 / 151 In statistics, _____ is an approach for modelling the relationship between s scalar dependent variable y and one or more explanatory variables denoted x Check 88 / 151 Given the following simple regression model Y = ao + a1X1 + a2X2, the dependent variable in the model is Check 89 / 151 The values of a parameter and that of the corresponding satatistics are not always the same _____ Uniform Population All of the above Sample 90 / 151 __________ occurs when/if an hypothesis (Null hypothesis) is rejected when it should be accepted and this occurs when the hypothesis value falls within acceptance region. Check 91 / 151 The discrete uniform distribution is commonly used in ______ programs that make equal probability random selections between a number of choices Check 92 / 151 The T statistic was introduced in _______ by William Sealy Gosset, a chemist working for the Guinness Brewery in Dublin, Ireland Check 93 / 151 Given a constant b such that the function f(n) = bn square is 0,1,2. Find the probability of x is greater than 1 and less than 2 0.26 0.3 None of the above 0.03 94 / 151 In test of hypothesis, the maximum probability of risking a type 1 error is known as the ________ Check 95 / 151 The probability (or risk) or committing type 2 error is denoted by the Greek letter Check 96 / 151 A regression analysis is inappropriate when there is heteroscedasticity in the scatter plot. you have two variables that are measured on an interval or ratio scale. you want to make predictions for one variable based on information about another variable the pattern of data points form a reasonably straight line. 97 / 151 In this situation, the population for which inferences is to be made is assumed to be normally distributed with _______ Check 98 / 151 A _____ is any statistical test in which the test statistic follows a students's t distribution if the null hypothesis is supported. T test All of the above F test Z test 99 / 151 the first important attribute of a sample is that every individual in the population from which it is drawn must have a known _____ chance of being included in it Check 100 / 151 The t test was ____ and ____ of two samples to make comparism Variables and Samples A and B Mean and Standard deviations Mean and Variables 101 / 151 In the case of more than one explanatory variable is called Check 102 / 151 Vivian Odishika company prints baseball cards. The company claims that 40% of the cards are rookies, 70% veterans and 10% are all stars. Suppose a random sample of 100 cards has 50 rookies, 48 veterans and 8 all stars. Using 95% level of significance, Calculate the claim of the compnay 19 18.2 19.58 None of the above 103 / 151 Another technique that can be employed with respect to the issue of rejecting or accepting Ho is _______ Check 104 / 151 _____ statistical test in which the critical area of a distribution is one-sided One-tailed test Chi-Square None of the above Hypothesis 105 / 151 ___________ is a statistical test that is used on paired nominal data Check 106 / 151 The _____ distribution is a two parameter family of continuous peobability distributions. Statistical Cauchy Gamma None of the above 107 / 151 _________ is a population commonly contains too many individuals to study conveniently Check 108 / 151 A graph for frequency distribution can be supplied by a histogram or by a polygon graph often called a _____ Check 109 / 151 A t-test is any statistical test in which the test statistic follows a studentâ€™s t ______ if the null hypothesis is supported. Check 110 / 151 Sampling where each member of the population may be chosen more than once is called sampling ________ Check 111 / 151 _____ error occurs when/if an hypothesis is rejected when it should be accepted Type 2 Type 1 Type 3 All of the above 112 / 151 ______ error occurs when/if an hypothesis is accepted when it should be rejected. type 3 None of the above type 2 type 1 113 / 151 ________ theory deals with the study of the relationships that exist between a given population and the samples drawn from the population. Check 114 / 151 If an individual were selected at random from a large group of adult females, the probability that it has height M is precisely 68 inches (that is 68.00 inches) would be zero. What is the probability that M is between 67.00 inches and 68.00 inches. 22 67 68 None of the above 115 / 151 The term regression was introduced by _____ Check 116 / 151 The two tailed test gets its name from testing the area under both of the tails (sides) of a _______ Check 117 / 151 Alternative hypothesis are usually denoted with the symbol _____ Check 118 / 151 Lebesgue measure is the standard way os assigning a measure to a_____ of an n-dimensional volume Check 119 / 151 A doctor claims that the mean weight of babies delivered at her hospital is 4.2kg. A Statistician takes a sample of 10 babies and obtains the following weights: 1.2, 2.8, 2.2, 3.1, 3.2, 3.7, 2.7, 4.0, 4.4, 4.1. Test the doctor's claim at 95% level of significance. None of the above 0.32 0.44 0.38 120 / 151 The ______ curve is one of the most popular models used in statistical tests of hypothesis Check 121 / 151 The regression equation for predicting number of speeding tickets (Y) from information about driver age (X) is Y = -.065(X) + 5.57. How many tickets would you predict for a twenty-year-old? 1 4.27 5.57 6 122 / 151 If the parameters are over estimated, the sampling errors are _______ Check 123 / 151 ___________ enables us to have an estimate of how sample mean deviates from the population mean. Check 124 / 151 A Company short lists 12 applicant for an interview out of which 4 are men. If there are only five vacant posts to be filled, find the probability that the list of successful applicant contains at least 2 men. 0.33 0.4 None of the above 0.8 125 / 151 The term regression was introduced by ______ German man Nigerian man Britsih man None of the above 126 / 151 Regression analysis is also used in casual relationship between a linear model that is between the dependent variable to an Check 127 / 151 Probability distribution assigns a probability to each measurable subset of the possible _____ Check 128 / 151 A continuous probability distribution is a probability distribution that has a probability ______ function Check 129 / 151 The Cauchy distribution is named after _____ Samuel Cauchy Augustina Cauchy None of the above Tenebe Cauchy 130 / 151 The _____ distribution has been applied to model the behaviour of random varaibles limited to intervals of finite length in a wide variety of disciples None of the above Gamma Uniform Cauchy 131 / 151 Given the following simple regression model Y = ao + a1X1, the independent varaible in the model is Check 132 / 151 The standard deviation is to the mean as the ____________ is to the regression line coefficient of determination SSR standard error of the estimate z-score 133 / 151 The density function is symmetrical about x equal to zero, so that its median is _______ Check 134 / 151 In test of hypothesis, the maximum probability of risking a ______ is known as the level of significance Type 1 error Data Varaible Staistical data 135 / 151 Given a population consisting of numbers 1,2,3,4,5,6. The mean of the population is 3.3 3.2 3 4.5 136 / 151 The probability (or risk) or committing type 1 error on a true null hypothesis is denoted by the Greek letter Check 137 / 151 In statistical analysis the 99% confident level is also known as ____ 0.21 0.01 0.12 0.002 138 / 151 The two types of hypothesis are ______ and _____ hypothesis Null and Alternative Alternative and Dull Null and Dull None of the above 139 / 151 A _________ is the set of all possible values of a particular statistic Check 140 / 151 _______ s a statistical test in which the critical area of a distribution is one-sided so that it is either greater than or less than a certain value, but not both. Check 141 / 151 A continuous random varaible is the one which can take a continuous range of _____ Check 142 / 151 If 150 tosses are made of a fair coin, find the probability that between 38% and 78% will be heads None of the above A and B 0.4321 0.5543 143 / 151 If the distribution of x is continuous, then x is called a _______ random variable Check 144 / 151 ______ measure is the standard way of assigning a measure to a subsets of an n-dimensional volume None of the above Probability Staistical Lebesgue 145 / 151 An F test is a statistical test in which the test statistics has ____ distribution under a null hypothesis situation None of the above A and B Z t 146 / 151 The null hypothesis in the chi-square test states that The rows and columns in the table are not associated The rows and columns in the table are associated None of the above Neither of the two 147 / 151 _____ is used when testing for independence in a contingency table Check 148 / 151 ___________ is a statistical test in which the critical area of a distribution is two sided and tests whether a sample is either greater than or less than a certain range of values. Check 149 / 151 Calculate the varaince of uniform distribution given that (a + b) = 6/200 and b = 2.20 while a = 1.10 0.21 2.15 None of the above 2.25 150 / 151 The standard deviation is to the mean as the ____________ is to the regression line. SSR standard error of the estimate coefficient of determination z-score 151 / 151 Interval estimation involves estimating an interval which is known as ______ Check Restart quiz Rate this quiz Send feedback