Question

In: Statistics and Probability

Refer to the accompanying​ table, which describes the number of adults in groups of five who...

Refer to the accompanying​ table, which describes the number of adults in groups of five who reported sleepwalking. Find the mean and standard deviation for the numbers of sleepwalkers in groups of five.

x   P(x)
0   0.170
1   0.353
2   0.317
3   0.128
4   0.029
5   0.003

The mean is.   ​sleepwalker(s). ​(Round to one decimal place as​ needed.)

Solutions

Expert Solution

X P(x) X * P ( X ) * P ( X )
0 0.17 0 0
1 0.353 0.353 0.353
2 0.317 0.634 1.268
3 0.128 0.384 1.152
4 0.029 0.116 0.464
5 0.003 0.015 0.075
Total 1 1.502 3.312

Mean   

Variance   

Standard deviation  

orchestra answered 2 years ago
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