Math, asked by abhishek43945, 11 months ago

calculate the mean deviation and standard deviation are follows ( class 11.

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Answers

Answered by tmkoc0101
2

Answer:


Step-by-step explanation:

Total number of person = 500

For grouped frequency consider an average or the midpoint of ages.

i:e

AGE     Number of person    

(a)                   (N)                        (a.n)

25                 3                              75

35                  51                           1785

45                   122                    5490

55                  141                      7755

65                   130                       8450

75                   51                      3825

85                   2                         170


∑a.n = 27550

Mean =  ∑(a.n)/∑n

= 27550/500

= 55.1

Use this to calculate S.D similarly.

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