Question

Answer question 29 by direct method only

Answer 1

Use step deviation method .... although it has more steps but it is an easier and a more efficient method ..... if u use direct method then the probability of getting calculation error increases

Answer 2

Answer:

No need to convert discontinuous classes into continuous for class mark because class mark of C.I are same and gives same result.

Assumed mean, a = 300.5

and di = (xi - a)

= 300.5 + 2800/50

= 356.5

Hence, the average daily income of employees is Rs.356.5