Question: 4. Find the standard deviation for the following frequency distribution of the hours spent at a youth-recreation center on a Saturday night by a sample

Find the standard deviation for the following frequency distribution of the hours spent at a youth-recreation center on a Saturday night by a sample of 20 teenagers. Do so by carrying out steps a-d listed below.

X f

5 3

4 5

3 7

2 3

1 2

N =20

a)make an fX column.

b)make an fX column.

c)find the mean.

d) find the standard deviation

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