Chapter:

# 30+ Unit 2 Solved MCQs

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Chapter: Unit 2
1.

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

A. Measures of dispersion
B. Measures of central tendency
C. Measures of skewness
D. Measures of kurtosis
2.

## The scatter in a series of values about the average is called:

A. Central tendency
B. Dispersion
C. Skewness
D. Symmetry
3.

## The measures used to calculate the variation present among the observations in the unit of the variable is called:

A. Relative measures of dispersion
B. Coefficient of skewness
C. Absolute measures of dispersion
D. Coefficient of variation
Answer» C. Absolute measures of dispersion
4.

## The measures used to calculate the variation present among the observations relative to their average is called:

A. Coefficient of kurtosis
B. Absolute measures of dispersion
C. Quartile deviation
D. Relative measures of dispersion
Answer» D. Relative measures of dispersion
5.

A. Constant
B. Flatness
C. Variation
D. Skewness
6.

A. Positive
B. Zero
C. Negative
D. Equal to 2
7.

A. Small
B. Large
C. Normal
D. Symmetrical
8.

A. Large
B. Small
C. Normal
D. Symmetric
9.

## Given below the four sets of observations. Which set has the minimum variation?

A. 46, 48, 50, 52, 54
B. 30, 40, 50, 60, 70
C. 40, 50, 60, 70, 80
D. 48, 49, 50, 51, 52
Answer» D. 48, 49, 50, 51, 52
10.

## Which of the following is an absolute measure of dispersion?

A. Coefficient of variation
B. Coefficient of dispersion
C. Standard deviation
D. Coefficient of skewness
11.

## The measure of dispersion which uses only two observations is called:

A. Mean
B. Median
C. Range
D. Coefficient of variation
12.

## The measure of dispersion which uses only two observations is called:

A. Range
B. Quartile deviation
C. Mean deviation
D. Standard deviation
13.

## In quality control of manufactured items, the most common measure of dispersion is:

A. Range
B. Average deviation
C. Standard deviation
D. Quartile deviation
14.

A. 140
B. 143
C. 146
D. 70
15.

A. -48
B. 40
C. -40
D. 48
16.

A. 0
B. 10
C. -10
D. 20
17.

A. 10
B. 15
C. 25
D. 35
18.

## Half of the difference between upper and lower quartiles is called:

A. Interquartile range
B. Quartile deviation
C. Mean deviation
D. Standard deviation
19.

A. 3
B. 1/3
C. 2/3
D. 1
20.

A. 48
B. 12
C. 24
D. 72
21.

## The sum of all the squared deviations is divided by the total number of observations to calculate

A. population deviation
B. population variance
C. sample deviation
D. sample variance
22.

## For the recorded observation, the ratios measured by absolute variation are considered as

A. non-relative measures
B. relative measures
C. high uniform measures
D. low uniform measures
23.

## If the arithmetic mean is multiplied to coefficient of variation then the resulting value is classified as

A. coefficient of deviation
B. coefficient of mean
C. standard deviation
D. variance
24.

A. 7.08
B. 9.08
C. 10.2
D. 11.2
25.

## For a positively skewed distribution, mean is always:

A. Less than the median
B. Less than the mode
C. Greater than the mode
D. Difficult to tell
Answer» C. Greater than the mode
26.

## If the sum of deviations from median is not zero, then a distribution will be:

A. Symmetrical
B. Skewed
C. Normal
D. All of the above
27.

A. Skewness
B. Symmetry
C. Dispersion
D. Kurtosis
28.

A. 81
B. 27
C. 9
D. 3
29.

A. 5
B. 15
C. 20
D. 25
30.

## The first three moments of a distribution about the mean are 1, 4 and 0. The distribution is:

A. Symmetrical
B. Skewed to the left
C. Skewed to the right
D. Normal
31.

A. β1 > 0
B. β1 < 0
C. β1 = 0
D. β1 = 3
32.

## The second and fourth moments about mean are 4 and 48 respectively, then the distribution is:

A. Leptokurtic
B. Platykurtic
C. Mesokurtic or normal
D. Positively skewed
33.

A. 0 and 1
B. 1 and +1
C. -1 and 0
D. -2 and +2
34.

## The value of β2 can be:

A. Less than 3
B. Greater than 3
C. Equal to 3
D. All of the above
Answer» D. All of the above