Category: STT205 0 STT205 1 / 50 The population mean ÃŽÂ¼ is an example of a: _________ Check 2 / 50 The median is considered a robust measure because it is resistant to: ________ Check 3 / 50 Any measure indicating the Centre of a set of data, arranged in an increasing or decreasing order of magnitude, is called a measure of: ______ Check 4 / 50 Which of the following statement does not represent a role of statistics in the society? Government uses statistics only for census Government uses statistics as a tool for collecting economic aggregates Businesses use statistics to monitor the national economy Government uses statistics to measure the effect of external factors on its policies 5 / 50 The following are examples of discrete random variables except Binomial distribution Normal Distribution Bernoulli distribution Poisson Distribution 6 / 50 The elimination of extreme scores at the top of the set has the effect of:_________ Check 7 / 50 The sum of the squares of the deviations about mean divided by the number of observations is: ________ Check 8 / 50 What is the geometric mean of 3, 5, 6, and 7 4.33 3.21 5.01 4.21 9 / 50 The first step in calculating the median of a discrete variable is to determine the: _______ Check 10 / 50 The square root of the sum of deviations of a set of numbers from their arithmetic mean is ___________ maximum zero minimum standard deviation 11 / 50 A set of data with only one mode is said to be __________ unicmodal uniquemodal unimodal singlemodal 12 / 50 What is the probability of not getting a 1 in the toss of a single die? \[\frac{5}{6}\] \[\frac{2}{3}\] \[\frac{1}{6}\] \[\frac{3}{5}\] 13 / 50 Calculate the standard deviation of the set of data in the table below 13.73 51.56 56.51 56.65 14 / 50 Any arrangement of r objects selected from a single group of n possible objects is called a ___________ factorial combination notation permutation 15 / 50 Suppose there are 70 students in an examination with the students writing at least one of the subjects; Chemistry, Physics and Biology. Thirty(30) students offer Physics, 33 offer Chemistry and 40 offer biology, 10 students offer both Physics and Chemistry. Fourteen (14) of the students offer Physics and Biology, and 15 of them offer Biology and Chemistry. How many students offer only Biology 20 10 11 17 16 / 50 The frequency distribution of the hourly wage rate of 60 employees of a paper mill is as follows: The mean wage rate is:N______ Check 17 / 50 What is the sum of the medians of {3, 4, 4, 5, 6, 8, 8, 10} and {5, 5, 7, 9, 11, 12, 15, 18} 10.5 15.5 19.5 25.5 18 / 50 Â Which of these is closer to the mode for a skewed distribution? median mean modal skewness 19 / 50 Which of the following is not a source of data? survey designs Micro-statistical information Statistical information in business Macro-statistical information 20 / 50 The sample mean X- is an example of a: ________________ Check 21 / 50 An impossible event has the probability ______ 0.5 0.25 1 0 22 / 50 The sum of the frequencies of 16 and 18 in the table below is _____________ 3 15 14 12 23 / 50 The sum of deviations taken from mean is: _______________ Check 24 / 50 Ten families have an average of 2 boys. How many boys do they have together? Check 25 / 50 ____ statistics deals with methods of organizing, summarizing and presenting data in an informative way Descriptive Inferential Inductive Frequency 26 / 50 What effect will the elimination of extreme scores at the bottom of a data set have on the mean? ______ Check 27 / 50 Primary data is not collected through ___________ observations surveys experiments gazettes 28 / 50 When all the values in a series occur the equal number of times, then it is not possible to calculate the:__________ Check 29 / 50 What is the relative cumulative frequency of 50 in the table below \[\frac{7}{20}\] 1 \[\frac{4}{5}\] 16 30 / 50 ______ is not a measure of dispersion standard deviation mean variance coefficient of variation 31 / 50 There are 5 different items to be stocked in a store with 3 bins for the storage. What are the possible number of arrangements? 37 55 60 36 32 / 50 If the arithmetic mean of the two numbers X1 and X2 is 5 if X1=3, then X2 is:_________ Check 33 / 50 The arithmetic mean is highly affected by: ________ Check 34 / 50 The mean of 10 observations is 10. All the observations are increased by 10%. The mean of increased observations will be: ______ Check 35 / 50 Calculate 70% of the mean of the set of data in the table below 2.975 4.25 42.5 29.75 36 / 50 In an examination the score obtained is weighted 3 times as much as a test score. If a student scored 85% in the examination with a test score of 90%, what is his mean score 0.8825 0.8625 0.937 0.9 37 / 50 A characteristics that assumes different values for different entities is called __________________ random variable sample population 38 / 50 The midpoint of the values after they have been ordered from the smallest to the largest or the largest to the smallest is called:____ Check 39 / 50 The sum of the squares of the deviations of the values of a variable is least when the deviations are measured from: ____________ Check 40 / 50 _____ is the degree of peakness of a distribution variation kurtosis platykurtic symmetry 41 / 50 The difference between the harmonic mean of 2, 4, 8 and their geometric mean is __________ 0.67 0.47 0.57 0.48 42 / 50 If at least one of the events of an experiment can occur, then they are said to be ________ events mutually exclusive independent dependent collectively exhaustive 43 / 50 If Ã¢Ë†â€˜i=110Xi-50=100 then sample mean X- will be: ________ Check 44 / 50 If the mode of the distribution is X the [frac{X}{2}] in the table below is _____________ 18 2.5 9 3 45 / 50 What is the cumulative frequency of 40 in table below? 9 \[\frac{9}{20}\] 7 10 46 / 50 If the arithmetic mean of 20 values is 10, then sum of these 20 values is:_____ Check 47 / 50 Step deviation method or coding method is used for computation of the______ Check 48 / 50 The square root of the sum of deviations of a set of numbers from their arithmetic mean is standard deviation maximum zero minimum 49 / 50 The first step involved in constructing a group frequency distribution is to _________ (a) (b) count the number of items count the number of items tally determine the number of classes distribute 50 / 50 ____ is not an advantage of secondary data They can be used to establish trends for forecasting They are available on a wide range of subjects They are the most appropriate for any statistical work They are inexpensive to collect Restart quiz Rate this quiz Send feedback