Question: estimate the mean age expressed in years, the sample variance, and the sample standard deviation for this graph age range=1-10, 11-20, 21-30, 30 and over

estimate the mean age expressed in years, the sample variance, and the sample standard deviation for this graph

age range=1-10, 11-20, 21-30, 30 and over

for number of individuals

1-10= 32

11-20 18

21-30= 25

31 and over= 14

mean=

s^2

s=

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