ANNA SWIATEK Save & End Certify Lessone 45-4.7 Applying the Standard De.. uestio

Question

ANNA SWIATEK Save & End Certify Lessone 45-4.7 Applying the Standard De.. uestion 7 of & Step 1 of t alculate the sample mean and sample variance for the folowing frequency distibution of heights in centimeters for a sample of B-year-old boys. Iif necessary, round to 6/10 Correct ne more decimal place than the largest number of decimal places given in the data Heights in Centimeters Class Frequency 120.1 123.8 239-127.6 15 27.7-1314 31.5-135.2 34 35.3-139.0 816 18 Copy Data ables Keypad How to enter your Sample meanc Sample varance Subrmit Answer B0 3 5 7 8 Ul

Explanation / Answer

The statistical software output for this problem is:

Approximate summary statistics:
Using counts in f

Hence,

Sample mean = 130.42

Sample variance = 25.96

Column Mean Variance x 130.41535 25.957687

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