Calculate the standard deviation for the following table giving age-distribution of 542 members: Age in years: 20-30 30-40 40-50 50-60 60-70 70-80 80-90 members: 132 153 140 For the two frequency distributions given below, the mean calculated from the first is 25.4 and from the second is 32.5. Class Distribution-I Frequency 10-20 20-30 15 30-40 10 40-50 2x 50-60 Find the values of x and y.
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Age in years: Midpoint (x): 20-30 25 30-40 35 40-50 45 50-60 55 60-70 65 70-80 75 80-90 85 Show more…
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