Category: STT205 0 STT205 1 / 70 A. The 75th percentile is the same as the ____ quartile 1. 2nd 2. 4th 3. 1st 4. 3rd 2 / 70 B. ____ is not an advantage of secondary data 1. They are available on a wide range of subjects 2. They are inexpensive to collect 3. They are the most appropriate for any statistical work 4. They can be used to establish trends for forecasting 3 / 70 C. If at least one of the events of an experiment can occur, then they are said to be ________ events 1. mutually exclusive 2. dependent 3. independent 4. collectively exhaustive 4 / 70 D. The sum of the squares of the deviations of the values of a variable is least when the deviations are measured from: ____________ Check 5 / 70 E.  Which of these is closer to the mode for a skewed distribution? 1. modal 2. mean 3. median 4. skewness 6 / 70 F. The total of all the observations divided by the number of observations is called: ______ Check 7 / 70 G. The first step in calculating the median of a discrete variable is to determine the: _______ Check 8 / 70 H. What is the range of the set of data in the below 1. 6 2. 21 3. 17 4. 6.5 9 / 70 I. Primary data is not collected through ___________ 1. observations 2. experiments 3. gazettes 4. surveys 10 / 70 J. A set of data with only one mode is said to be __________ 1. singlemodal 2. uniquemodal 3. unicmodal 4. unimodal 11 / 70 K. The sum of the squares of the deviations about mean divided by the number of observations is: ________ Check 12 / 70 L. The sum of the frequencies of 16 and 18 in the table below is _____________ 1. 14 2. 12 3. 3 4. 15 13 / 70 M. The sum of deviations taken from mean is: _______________ Check 14 / 70 N. The elimination of extreme scores at the top of the set has the effect of:_________ Check 15 / 70 O. 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 16 / 70 P. Sum of absolute deviations of the values is least when deviations are taken from: ________ Check 17 / 70 Q. There are 5 different items to be stocked in a store with 3 bins for the storage. What are the possible number of arrangements? 1. 60 2. 37 3. 36 4. 55 18 / 70 R. An impossible event has the probability ______ 1. 1 2. 0 3. 0.5 4. 0.25 19 / 70 S. The square root of the sum of deviations of a set of numbers from their arithmetic mean is ___________ 1. maximum 2. zero 3. standard deviation 4. minimum 20 / 70 T. Step deviation method or coding method is used for computation of the______ Check 21 / 70 U. If the arithmetic mean of 20 values is 10, then sum of these 20 values is:_____ Check 22 / 70 V. Ten families have an average of 2 boys. How many boys do they have together? Check 23 / 70 W. The mean of 10 observations is 10. All the observations are increased by 10%. The mean of increased observations will be: ______ Check 24 / 70 X. 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 1. 0.9 2. 0.937 3. 0.8825 4. 0.8625 25 / 70 Y. When the values in a series are not of equal importance, we calculate the: _____________ Check 26 / 70 Z. A characteristics that assumes different values for different entities is called __________________ 1. random 2. variable 3. sample 4. population 27 / 70 AA. Any arrangement of r objects selected from a single group of n possible objects is called a ___________ 1. factorial 2. permutation 3. notation 4. combination 28 / 70 AB. If the smallest observation in a data is decreased, the average which is not affected is: ____ Check 29 / 70 AC. The empirical relationship between the mean and median is given by; mean �?? mode = x(mean �?? median) in the table below . Then x is _________________ 1. 4.0 2. 3.0 3. 1.0 4. 4.5 30 / 70 AD. ____ is not an axiom of probability 1. \[P(\Omega)= 1\] 2. \[P(\Omega)= 0\] 3. \[P(E)\leq 0\] 4. \[P(E)\leq 1\] 31 / 70 AE. The first step involved in constructing a group frequency distribution is to _________ (a) (b) count the number of items 1. tally 2. count the number of items 3. distribute 4. determine the number of classes 32 / 70 AF. 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 33 / 70 AG. A student scored 45% in MTH101, 62% in MTH102, 30% in BUS103, and 70% in ACC101. Find his GPA if the respective credits are 3, 2, 2, 3 1. 2.90 2. 3.90 3. 3.10 4. 63% 34 / 70 AH. Which of the following statement does not represent a role of statistics in the society? 1. Government uses statistics only for census 2. Businesses use statistics to monitor the national economy 3. Government uses statistics to measure the effect of external factors on its policies 4. Government uses statistics as a tool for collecting economic aggregates 35 / 70 AI. When all the values in a series occur the equal number of times, then it is not possible to calculate the:__________ Check 36 / 70 AJ. What is the cumulative frequency of 40 in table below? 1. \[\frac{9}{20}\] 2. 7 3. 10 4. 9 37 / 70 AK. The suitable average for qualitative data is: ________ Check 38 / 70 AL. The arithmetic mean is highly affected by: ________ Check 39 / 70 AM. _____ is the degree of peakness of a distribution 1. symmetry 2. platykurtic 3. kurtosis 4. variation 40 / 70 AN. 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 1. 10 2. 11 3. 20 4. 17 41 / 70 AO. ____ statistics deals with methods of organizing, summarizing and presenting data in an informative way 1. Inductive 2. Descriptive 3. Frequency 4. Inferential 42 / 70 AP. The population mean μ is an example of a: _________ Check 43 / 70 AQ. Given X1=20 and X2=-20. The arithmetic mean will be: ________ Check 44 / 70 AR. A frequency curve of a normal distribution is ____ shaped 1. bell 2. cup 3. octagon 4. oblong 45 / 70 AS. The sum of deviations is zero when deviations are taken from:________ Check 46 / 70 AT. 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. Find the number of students that offer all subjects 1. 6 2. 8 3. 11 4. 7 47 / 70 AU. If the arithmetic mean of the two numbers X1 and X2 is 5 if X1=3, then X2 is:_________ Check 48 / 70 AV. The following are examples of discrete random variables except 1. Bernoulli distribution 2. Normal Distribution 3. Binomial distribution 4. Poisson Distribution 49 / 70 AW. What is the probability of not getting a 1 in the toss of a single die? 1. \[\frac{5}{6}\] 2. \[\frac{2}{3}\] 3. \[\frac{1}{6}\] 4. \[\frac{3}{5}\] 50 / 70 AX. ______ is not a measure of dispersion 1. coefficient of variation 2. mean 3. standard deviation 4. variance 51 / 70 AY. If ∑i=110Xi-50=100 then sample mean X- will be: ________ Check 52 / 70 AZ. If the mode of the distribution is X the [frac{X}{2}] in the table below is _____________ 1. 18 2. 2.5 3. 3 4. 9 53 / 70 BA. Which of the following is not a source of data? 1. Micro-statistical information 2. survey designs 3. Statistical information in business 4. Macro-statistical information 54 / 70 BB. Scores that differ greatly from the measures of central tendency are called:_________ Check 55 / 70 BC. A Poisson distribution is given by [p(x)=frac{0.72^{x} e^{-0.72}}{x!}]. Calculate the variance 1. 5.72 2. 2.27 3. 0.72 4. 0.23 56 / 70 BD. What is the geometric mean of 3, 5, 6, and 7 1. 4.33 2. 4.21 3. 3.21 4. 5.01 57 / 70 BE. The sample mean X- is an example of a: ________________ Check 58 / 70 BF. The addition rule of probability is used for ___ events 1. mutually exclusive 2. independent 3. mutually inclusive 4. dependent 59 / 70 BG. 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} 1. 15.5 2. 25.5 3. 10.5 4. 19.5 60 / 70 BH. 36. If 5, 8, 6 and 2 occur with frequencies 3, 2, 4 and 1 respectively, find the mean 1. 5.7 2. 15.7 3. 9.7 4. 5.75 61 / 70 BI. If a constant value is added to every observation of data, how would the value of the arithmetic mean behave? ________ Check 62 / 70 BJ. What is the relative cumulative frequency of 50 in the table below 1. \[\frac{4}{5}\] 2. \[\frac{7}{20}\] 3. 16 4. 1 63 / 70 BK. The median is considered a robust measure because it is resistant to: ________ Check 64 / 70 BL. 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 65 / 70 BM. Calculate 70% of the mean of the set of data in the table below 1. 29.75 2. 2.975 3. 42.5 4. 4.25 66 / 70 BN. The arithmetic mean of 10 items is 4 and the arithmetic mean of 5 items is 10. The combined arithmetic mean is: ______ Check 67 / 70 BO. What effect will the elimination of extreme scores at the bottom of a data set have on the mean? ______ Check 68 / 70 BP. The square root of the sum of deviations of a set of numbers from their arithmetic mean is 1. minimum 2. maximum 3. zero 4. standard deviation 69 / 70 BQ. The difference between the harmonic mean of 2, 4, 8 and their geometric mean is __________ 1. 0.47 2. 0.67 3. 0.57 4. 0.48 70 / 70 BR. Calculate the standard deviation of the set of data in the table below 1. 51.56 2. 56.65 3. 13.73 4. 56.51 Restart quiz Rate this quiz Send feedback
