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Compute the first four moments about the mean from the following frequency distribution. Also calculate b1...

Compute the first four moments about the mean from the following frequency distribution. Also calculate b1 and b2 and use Charlier check.

Group 2-4 4-6 6-8 8-10 10-12 12-14 14-16 16-18 18-20
Frequency 18 24 47 80 101 66 40 21 15
Math   Statistics-And-Probability   
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