You can put this solution on YOUR website! Construct the following table
:
class|midpoint|frequency|midpoint*frequency
:
1-2 1.5 16 24
:
3-4 3.5 24 84
:
5-6 5.5 17 93.5
:
7-8 7.5 20 150
:
9-10 9.5 23 218.5
:
Sum all the entries for midpoint*frequency
:
Sum(midpoint*frequency) = 24 +84 +93.5 +150 +218.5 = 570
:
Sum all the frequencies
:
Sum(frequencies) = 16 +24 +17 +20 +23 = 100
:
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Approximate mean of the frequency distribution = sum(midpoint*frequency)/sum(frequencies) = 570/100 = 5.7
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