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For a data set obtained from a sample of size n = 64 with x bar = 46.25, it is known that Ï = 5.6.
(a) What is the point estimate of µ? (I think it's 46.25?)
(b) Find z score corresponding to a 95% confidence level, zα/2. Recall that (1 â α)100% = 95%. z = -1.96 = .0250
(c) Construct a 95% confidence interval for µ.
(d) What is the margin of error in part (c)?
(d) Find zα/2 for 95% confidence level.
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