# Basic Statistics Mcqs For Pcs Exams

Question 1

The mean of a distribution is 14 and the standard deviation is 5. What is the value of the coefficient of variation?A 60.4%

B 48.3%

C 35.7%

D 27.8%

Question 2

The mean of a distribution is 23, the median is 24, and the mode is 25.5. It is most likely that this distribution is:A Positively Skewed

B Symmetrical

C Asymptotic

D Negatively Skewed

Question 3

Which of the following describe the middle part of a group of numbers?A Measure of Variability

B Measure of Central Tendency

C Measure of Association

D Measure of Shape

Question 4

According to the empirical rule, approximately what percent of the data should lie within μ±2σ?A 75%

B 68%

C 99.7%

D 90%

E 95%

Question 5

The sum of the deviations about the mean is always:A Range

B Zero

C Total Standard Deviation

D Positive

E Negative

Question 6

The middle value of an ordered array of numbers is theA Mode

B Mean

C Median

D MidPoint

Question 7

Which of the following is not a measure of central tendency?A Percentile

B Quartile

C Standard deviation

D Mode

Question 8

Which of the following divides a group of data into four subgroups?A Percentiles

B Deciles

C Median

D Quartiles

E Standard Deviation

Question 9

If the standard deviation of a population is 9, the population variance is:A 9

B 3

C 21

D 81

Question 10

If a distribution is abnormally tall and peaked, then is can be said that the distribution is:A leptokurtic

B pyrokurtic

C platykurtic

D mesokurtic

Question 11

Sum of dots when two dice are rolled isA a discrete variable

B a continuous variable

C a constant

D a qualitative variable

Question 12

The weights of students in a college/school is aA Discrete Variable

B Continuous Variable

C Qualitative Variable

D None of these

Question 13

The number of accidents in a city during 2010 isA Discrete variable

B Continuous variable

C Qualitative variable

D Constant

Question 14

Which of these represent qualitative dataA Height of a student

B Liking or disliking of (500) persons of a product

C Income of a government servant in a city

D Yield from a wheat plot

Question 15

Life of a T.V picture tube is aA Discrete variable

B Continuous variable

C Qualitative variable

D Constant

Question 16

The first hand and unorganized form of data is calledA Secondary data

B Organized data

C Primary data

D None of these

Question 17

The data which have already been collected by some one are calledA Raw data

B Array data

C Secondary data

D Fictitious data

Question 18

Census reports used as a source of data isA Primary source

B secondary source

C Organized data

D none

Question 19

The grouped data is also calledA Raw data

B Primary data

C Secondary data

D Qualitative data

Question 20

Primary data and _____________ data are sameA Grouped

B Secondary data

C Ungrouped

D None of these

Question 21

Questionnaire survey method is used to collectA Secondary data

B Qualitative variable

C Primary data

D None of these

Question 22

Data collected by NADRA to issue computerized identity cards (CICs) areA Unofficial data

B Qualitative data

C Secondary data

D Primary data

E None of these

Question 23

Population census is conducted throughA Sample survey

B Accounting

C Investigation

D Complete enumeration

Question 24

A parameter is a measure which is computed fromA Population data

B Sample data

C Test statistics

D None of these

Question 25

Given X

1=12,

X

2=19,

X

3=10,

X

4=7, then

∑

4

i=1 equals? A 36

B 48

C 41

D 29

E None of these

Question 26

A chance variation in an observational process isA Dispersion/ Variability

B Measurement error

C Random error

D Instrument error

Question 27

A constant variable can take valuesA Zero

B Fixed

C Not fixed

D nothing