Question: a. Repeat part (b) of Exercise 10.48 after discovering that the population standard deviation is actually 100. b. Repeat part (b) of Exercise 10.48 after

a. Repeat part (b) of Exercise 10.48 after discovering that the population standard deviation is actually 100.
b. Repeat part (b) of Exercise 10.48 after discovering that the population standard deviation is actually 400.

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