Question 1

In order to compare two series we can use

Accepted Answer

A)  Coefficient of Variation
B)  Standard deviation
C)  Coefficient of Skewness
D)  Coefficient of kurtosis A

Question 2

Which of the following is a unit free measure of dispersion:

Accepted Answer

A)  Range
B)  Standard deviation
C)  Interquartile range
D)  Coefficient of range D

Question 3

If one of the regression coefficients is greater than unity, the other must be:

Accepted Answer

A)  More than Unity
B)  Less than Unity
C)  Unity
D)  all B

Question 4

The coefficient of variation cannot be meaningfully used to compare the variability of two or more sets of data, when

Accepted Answer

A)  The standard deviation is zero for one or more sets of data
B)  The standard deviation is 1 for one or more sets of data
C)  The mean is zero for one or more sets of data
D)  The mean is 1 for one or more sets of data

Question 5

Standard deviation is always computed from

Accepted Answer

A)  Mean
B)  Median
C)  Mode
D)  geometric mean

Question 6

Following are the Relative measures of dispersion except

Accepted Answer

A)  Co-efficient of Mean deviation
B)  Standard deviation
C)  Co-efficient of Range
D)  Co-efficient of Quartile deviation

Question 7

Correlation analysis is a ..............................

Accepted Answer

A)  Univariate analysis
B)  Bivariate analysis
C)  Multivariate analysis
D)  Both Bivariate and Multivariate analysis

Question 8

The mean deviation is minimum when deviations are taken from:

Accepted Answer

A)  Mean
B)  Median
C)  Mode
D)  None of these

Question 9

The rank correlation coefficient was discovered by....................................

Accepted Answer

A)  Fisher
B)  Spearman
C)  Karl Pearson
D)  Bowley

Question 10

For a symmetrical distribution Q1=25, Q3=45, the median is

Accepted Answer

A)  20
B)  25
C)  35
D)  None of these

Question 11

The degree of peaked ness or flatness of a unimodal distribution is called:

Accepted Answer

A)  Skewness
B)  Kurtosis
C)  Dispersion
D)  Normal distribution

Question 12

The point of intersection of two regression lines is..........................

Accepted Answer

A)  (0,0) 
B)  (1,1) 
C)  (x,y) 
D)  (x̄, ӯ)

Question 13

If r = ± 1, the two regression lines are...............................

Accepted Answer

A)  Coincident
B)  Parallel
C)  Perpendicular to each other
D)  None of these

Question 14

If bxy and byx are two regression coefficients, they have:

Accepted Answer

A)  Same signs
B)  Opposite signs
C)  Either a or b
D)  None of the above.

Question 15

The smaller the variance the less spread of the data around the mean

Accepted Answer

A)  True
B)  False
C)  none
D)  all

Question 16

The suitable average for averaging the shoe sizes for children is:

Accepted Answer

A)  Mean
B)  Median
C)  Mode
D)  Geometric mean

Question 17

The standard deviation is independent of:

Accepted Answer

A)  Change of scale
B)  Change of origin
C)  Change of origin and scale
D)  None of these

Question 18

If the values of mean, median and mode coincide in a unimodal distribution, then the distribution will be:

Accepted Answer

A)  Positively Skewed
B)  Symmetrical
C)  Negatively Skewed
D)  None of these

Question 19

Which of the following is true, if there is no dispersion in a data set:

Accepted Answer

A)  All the mathematical and positional averages are equal.
B)  All the mathematical averages are equal but the positional averages are not equal
C)  All the mathematical averages are equal to zero
D)  None of these

Question 20

The measurements of spread or scatter of the individual values around the central point is called:

Accepted Answer

A)  Measures of dispersion
B)  Measures of skewness
C)  Measures of central tendency
D)  Measures of kurtosis

Exam 8: Statistics and Data Analysis