# Statistics Mcqs For Lecturer & Subject Specialist Exams

In statistics, conducting a survey meansA Collecting information from elementsB Making mathematical calculations

C Drawing graphs and pictures

D None of the above

Question 2

Which branch of statistics deals with the techniques that are used to organize, summarize, and present the data:A Advanced Statistics

B Probability Statistics

C Inferential Statistics

D Descriptive Statistics

E Bayesian Statistics

Question 3

In descriptive statistics, we studyA The description of decision making process

B The methods for organizing, displaying, and describing data

C How to describe the probability distribution

D None of the above

Question 4

In statistics, a population consists of:A All People living in a country

B All People living in the are under study

C All subjects or objects whose characteristics are being studied

D None of the above

Question 5

Which one of the following measurement does not divide a set of observations into equal parts?A Quartiles

B Standard Deviations

C Percentiles

D Deciles

E Median

Question 6

Which one is the not measure of dispersion.A The Range

B 50th Percentile

C Inter-Quartile Range

D Variance

Question 7

Data in the Population Census Report is:A Grouped data

B Ungrouped data

C Secondary data

D Primary data

E Arrayed data

Question 8

When data are collected in a statistical study for only a portion or subset of all elements of interest we are using:A A sample

B A Parameter

C A Population

D Both b and c

Question 9

In inferential statistics, we studyA the methods to make decisions about population based on sample results

B how to make decisions about mean, median, or mode

C how a sample is obtained from a population

D None of the above

Question 10

You asked five of your classmates about their height. On the basis of this information, you stated that the average height of all students in your university or college is 67 inches. This is an example of:A Descriptive statistics

B Inferential Statistics

C Parameter

D Population

Question 11

Statistic is a numerical quantity, which is calculated from:A Population

B Sample

C Data

D Observations

Question 12

The algebraic sum of deviations from mean is:A Maximum

B Zero

C Minimum

D Undefined

Question 13

In statistics, a sample meansA A portion of the sample

B A portion of the population

C all the items under investigation

D none of the above

Question 14

The height of a student is 60 inches. This is an example of --------------A Qualitative data

B Categorical data

C Continuous data

D Discrete data

Question 15

Which of the following is not based on all the observations?A Arithmetic Mean

B Geometric Mean

C Harmonic Mean

D Weighted Mean

E Mode

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There are 15 questions to complete.

Test 3

MCQs about Measure of DispersionQuestion 1

Suppose for 40 observations, the variance is 50. If all the observations are increased by 20, the variance of these increased observation will beA 50

B 70

C 50/20

D 50-20=30

E 50

Question 2

Variance remains unchanged by change ofA Origin

B Scale

C Both

D None of these

Question 3

If X and Y are independent then SD (X − Y) isA SD(X)−SD(Y)

B SD(X)+SD(Y)

C SD(X)+SD(Y)

−

−

−

−

−

−

−

−

−

−

−

−

−

√

D Var(X)+Var(Y)

−

−

−

−

−

−

−

−

−

−

−

−

−

−

√

Question 4

The sum of squares of deviation is least if measure fromA Mean

B Mode

C Median

D Variance

Question 5

The variance of a constant isA zero

B constant

C a

D None

Question 6

The standard deviation is always _________ than mean deviationA Greater

B Less

C Equal

D None

Question 7

Lowest value of variance can beA 1

B -1

C 3

D -3

E 0

Question 8

Mean Deviation, Variance and Standard Deviation of the values 4, 4, 4, 4, 4, 4 isA 4

B 8

C 2

D 12

E 0

Question 9

The sum of squared deviations of a set of n values from their mean isA Zero

B Maximum

C Least

D None

Question 10

If Y=5X+10, then mean deviation of Y isA 5 mean deviation (X)

B 25 mean deviation (X)

C 5 mean deviation (X) + 10

D None of these

Question 11

For a symmetrical distribution approximately 68% of the cases are included between Visit Page: MCQ StatisticsA X

¯

¯

¯−S and

X

¯

¯

¯+S

B X

¯

¯

¯−2S and

X

¯

¯

¯+2S

C X

¯

¯

¯−3S and

X

¯

¯

¯+3S

D None of these

Question 12

Variance is always calculated fromA Mode

B Varaince

C Geometric Mean

D Median

E Mean

Question 13

The variance of 5 numbers is 10. If each number is divided by 2, then the variance of new numbers isA 20

B 5

C 2.5

D 5

E 0

Question 14

Standard deviation is calculated from the Harmonic Mean (HM)A Always

B Sometimes

C Never

D None of these

Question 15

The percentage of values lies between X

¯

¯

¯±2SD isA 68.26%

B 95.45%

C 99.7%

D 65%

E 99%

Question 16

The measure of dispersion is changed by a change ofA Origin

B Scale

C Algebraic Signs

D None

Question 17

The mean deviation of the values, 18, 12, 15 isA 6

B zero

C 3

D 2

Question 18

Which of these is a relative measure of dispersion http://itfeature.comA Standard Deviation

B Variance

C Coefficient of Variation

D Non of these

Question 19

If all values are same then the measure of dispersion will beA 1

B 0

C Mean

D Mode

E Median

Question 20

Var(2X+3) isA 5 Var(X)

B 4 Var(X)

C 4 Var(X)+3

D 5 Var(X) + 3

Question 21

If the standard deviation of the values 2, 4, 6, 8 is 2.33, then the standard deviation of the values 4, 6, 8, 10 isA 0

B 2.5

C 5

D 4.66

E 2.33

Question 22

If a and b are two constants, then Var(a+bX) isA a±bVar(X)

B Var(a)±Var(X)

C ±bVar(X)

D b

2±Var(X)

E (a±b)Var(X)

Question 23

If Y=−8X − 5 and SD of X is 3, then SD of Y isA 8

B 3

C 5

D 24

E None

Question 24

A measure of dispersion is always ________A zero

B Positive

C Negative

D Infinity

Question 25

The measure of Dispersion can never beA Positive

B Negative

C 0

D 1

Suppose for 40 observations, the variance is 50. If all the observations are increased by 20, the variance of these increased observation will beA 50

B 70

C 50/20

D 50-20=30

E 50

Question 2

Variance remains unchanged by change ofA Origin

B Scale

C Both

D None of these

Question 3

If X and Y are independent then SD (X − Y) isA SD(X)−SD(Y)

B SD(X)+SD(Y)

C SD(X)+SD(Y)

−

−

−

−

−

−

−

−

−

−

−

−

−

√

D Var(X)+Var(Y)

−

−

−

−

−

−

−

−

−

−

−

−

−

−

√

Question 4

The sum of squares of deviation is least if measure fromA Mean

B Mode

C Median

D Variance

Question 5

The variance of a constant isA zero

B constant

C a

D None

Question 6

The standard deviation is always _________ than mean deviationA Greater

B Less

C Equal

D None

Question 7

Lowest value of variance can beA 1

B -1

C 3

D -3

E 0

Question 8

Mean Deviation, Variance and Standard Deviation of the values 4, 4, 4, 4, 4, 4 isA 4

B 8

C 2

D 12

E 0

Question 9

The sum of squared deviations of a set of n values from their mean isA Zero

B Maximum

C Least

D None

Question 10

If Y=5X+10, then mean deviation of Y isA 5 mean deviation (X)

B 25 mean deviation (X)

C 5 mean deviation (X) + 10

D None of these

Question 11

For a symmetrical distribution approximately 68% of the cases are included between Visit Page: MCQ StatisticsA X

¯

¯

¯−S and

X

¯

¯

¯+S

B X

¯

¯

¯−2S and

X

¯

¯

¯+2S

C X

¯

¯

¯−3S and

X

¯

¯

¯+3S

D None of these

Question 12

Variance is always calculated fromA Mode

B Varaince

C Geometric Mean

D Median

E Mean

Question 13

The variance of 5 numbers is 10. If each number is divided by 2, then the variance of new numbers isA 20

B 5

C 2.5

D 5

E 0

Question 14

Standard deviation is calculated from the Harmonic Mean (HM)A Always

B Sometimes

C Never

D None of these

Question 15

The percentage of values lies between X

¯

¯

¯±2SD isA 68.26%

B 95.45%

C 99.7%

D 65%

E 99%

Question 16

The measure of dispersion is changed by a change ofA Origin

B Scale

C Algebraic Signs

D None

Question 17

The mean deviation of the values, 18, 12, 15 isA 6

B zero

C 3

D 2

Question 18

Which of these is a relative measure of dispersion http://itfeature.comA Standard Deviation

B Variance

C Coefficient of Variation

D Non of these

Question 19

If all values are same then the measure of dispersion will beA 1

B 0

C Mean

D Mode

E Median

Question 20

Var(2X+3) isA 5 Var(X)

B 4 Var(X)

C 4 Var(X)+3

D 5 Var(X) + 3

Question 21

If the standard deviation of the values 2, 4, 6, 8 is 2.33, then the standard deviation of the values 4, 6, 8, 10 isA 0

B 2.5

C 5

D 4.66

E 2.33

Question 22

If a and b are two constants, then Var(a+bX) isA a±bVar(X)

B Var(a)±Var(X)

C ±bVar(X)

D b

2±Var(X)

E (a±b)Var(X)

Question 23

If Y=−8X − 5 and SD of X is 3, then SD of Y isA 8

B 3

C 5

D 24

E None

Question 24

A measure of dispersion is always ________A zero

B Positive

C Negative

D Infinity

Question 25

The measure of Dispersion can never beA Positive

B Negative

C 0

D 1

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