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For a data set obtained from a sample of size n = 64 with x = 45.75, it is known that o = 4.9. (a)

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For a data set obtained from a sample of size n = 64 with x = 45.75, it is known that o = 4.9. (a) What is the point estimate of u? (b) Find z score corresponding to a 95% confidence level, Za/2. Recall that (1 - a) 100% = 95%. Give your answer with two decimal places. Z = (c) Construct a 95% confidence interval for u. Round the answers to four decimal places.

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