# 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