10 Nov 4.24 Refer to Exercise 4.23. Calculate the varianc
4.24 Refer to Exercise 4.23. Calculate the variance foreach part. Was your answer in Exercise 4.23 correct?4.25 A friend calculates a variance and reports that it is25.0. How do you know that he has made a seriouscalculation error?4.26 Create a sample of five numbers whose mean is6 and whose standard deviation is 0.4.27 A set of data whose histogram is bell shaped yields amean and standard deviation of 50 and 4, respectively.Approximately what proportion of observationsa. are between 46 and 54?b. are between 42 and 58?c. are between 38 and 62?
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