# Finding the mean and standard deviation using frequency table

The score distribution shown in the table is for all students who took a yearly AP stats exam.

Score Percent of Students

5 12.4

2 21.7

3 25.4

2 18.4

1 22.1

Find the mean AND standard deviation:

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#### Solution Preview

E(x) = Mean = [ 5*(0.124) + 4*(0.217)+3*(0.254)+2*(0.184)+1*(0.221) ...

#### Solution Summary

The solution gives detailed steps on finding the mean and standard deviation using a frequency table.

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