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Suppose n = 16 and the variance of the distribution is unknown. You observe S2 = 104.7. What is the range of sample means under which you would accept the hypothesis μ = -12 vs the alternative hypothesis μ > -12, at a significance level of 90%?
A. (-∞,-3.23]
B. (-∞,-8.57]
C. (-∞,23.09]
D. (-∞,-7.52]
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A random sample of 20 shipments gives x‾ = 2.6 days and s = 0.4 day. Give a 99% confidence interval for the average transit time.
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