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Finding the mean and standard deviation using frequency table

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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 Summary

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

Solution Preview

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

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