Which of the following is a relative measure of dispersion?

• Standard deviation

• Variance

• Co-efficient of variation

• None of the above

In statistics, ___________________________ classification includes data according to the time period in which the items under consideration occurred.

• Chronological

• Alphabetical

• Geographical

• Topological

The value lying half way between the upper limit and lower limit of the class is:

• Class interval

• Mid point

• Frequency

• None of the above

If the class mid points in a frequency distribution of age of a group of persons are 25, 32, 39, 46, 53 and 60. The size of class interval is:

• 5

• 7

• 9

• 8

The first step in tabulation is:

• Foot note

• Source note

• Captions

• Classification

One dimensional diagram is:

• Line diagram

• Rectangles

• Cubes

• Pie diagram

In a moderately symmetric distribution mean, median and mode are connected by:

• Mode = 2 median – 3 mean

• Mode = 3 median – 4 mean

• Mode = 3 median – 2 mean

• Mode = 2 median – 4 mean

. Find the Quartile deviation for the distribution: Class Interval: 0 – 15 15 -30 30 – 45 45 – 60 60 – 75 75 – 90 90 – 105

f: 8 26 30 45 20 17 4

• 15.44

• 16.22

• 14.55

• 17.33

. From the monthly income of 10 families find the coefficient of range is:

S. No: 1 2 3 4 5 6 7 8 9 10

Income in (Rs.): 145 367 268 73 185 619 280 115 870 315

• 0.1

• 0.6

• 0.84

• 0.56

Find the Mean deviation from the Mean for the following Class Interval: 0 – 10 10 – 20 20 – 30 30 – 40 40 -50 50 – 60 60 – 70

Frequency: 8 12 10 8 3 2 7

• 14

• 15

• 16

• 12