Question

A survey recorded the number of children 18 years old or younger who lived in 200...

A survey recorded the number of children 18 years old or younger who lived in 200 households. The accompanying table shows the results.

a. Determine the mean number of children per household.

b. Determine the standard deviation for the number of children per household.

Number_of_Children   Number_of_Families
0 89
1 38
2 41
3 22
4 8
5 2

Math   Statistics-And-Probability   
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Homework Answers

Answer #1

Solution-

Let

X = number of children

f = number of families (frequency)

a. mean number of children per household.

= 1.14

b. the standard deviation for the number of children per household.

= 1.2643

Calculations-

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