Business Statistics Question Banks

The following table gives the marks in mathematics and statistics of ten students.

a. Calculate two regression coefficients.

b. Calculate two regression lines.

c. Find Karl Pearson's coefficient of correlation and test its significance.

d. Estimate the most likely marks in statistics when the marks in mathematics is 52.

Expenditure	0-20	20-40	40-60	60-80	80-100
No. of Families	14	?	27	?	15

Marks	0 - 10	10 - 20	20 - 30	30 - 40	40 - 50	50 - 60	60 - 70
No. of Students	7	8	13	29	35	9	3

No. of face 4,5 or 6	0	1	2	3	4	5
Observed frequency	2	10	26	35	15	8

Income (Rs '000)	20-30	30-40	40-50	50-60	60-70	Total
No. of employees	7	10	20	18	7	62

Business Statistics