For a data set obtained from a sample of size n = 64 with x = 44.25, it is known that o = 5.5. (a) What is the point estimate of u? H= i (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= i (c) Construct a 95% confidence interval for u. Round the answers to four decimal places. <μ< i (d) What is the margin of error in part (c)? Round the answer to four decimal places. i E= i

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