For Exercises 8.49 to 8.51, see page 437; for 8.52 and 8.53, see pages 439440; for 8.54 to 8.56, see page 440; for 8.57 to 8.58, see page 444; for 8.59, see page 445; and for 8.60, see page 447.

Question 8.49

8.49 Rules for means and variances.

Suppose , , , and . Find the mean and the standard deviation of the sampling distribution of .

8.49

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