Calculate range and coefficient of range from the data given below:

Marks (Above):	10	20	30	40	50	60	70	80
No of Students:	4	6	8	9	12	14	16	20

3

(a)

Calculate range and coefficient of range from the data given below:

Marks:	5-9	10-14	15-19	20-24	25-29	30-34	35-39	40-44
No of Students:	4	6	2	4	2	7	3	2

3

(a)

From the data given below, find Quartile Deviation and coefficient of Q.D.

Marks obtained	No. of students
Less than 10	3
Less than 20	5
Less than 30	10
Less than 40	18
Less than 50	25
Less than 60	30

3

(a)

What is dispersion? What is the difference between an average and dispersion?

3

(a)

Differentiate between absolute and relative measures of dispersion.

3

(a)

If there is high variability in the distribution of income and wealth of the country then which value is compromised?

3

(a)

Find Range and coefficient of range from the data given below:

4

5

12

18

31

25

34

56

67

90

100

3

(a)

Find Q.D. and Coefficient of Q.D. from the data given below:

Size:	58	59	60	61	62	63	64	65	66
Frequency:	15	20	32	35	33	22	20	10	8

3

(a)

Average daily wage of 50 workers of a factory was Rs. 200 with a standard deviation of Rs. 40. each worker is given a raise of Rs. 20. What is the new average daily wage and standard deviation? Have the wages become more or less uniform?

3

(a)

If in the precious question each worker is given a hike of 10% in wages, how are the mean and standard deviation values affected?

3

(a)

In the previous question, Calculate the relative measures of variation and indicate the value which in your opinion, is more reliable.

3

(a)