Mathematics, 15.05.2021 17:40 BallerAlert1644

Assume that a simple random sample has been selected from a normally distributed population. Find the test statistic, P-value, critical value(s), and state the final conclusion. Test the claim that for the population of history exams, the mean score is 80. Sample data are summarized as n = 16, modifying above x with bar= 84.5, and s = 11.2. Use a significance level of α = 0.01. Select the correct test statistic and critical value.

A. Test statistic: z = 1.607. Critical values: z = –2.947.
B. Test statistic: t = –1.607. Critical values: t = –2.947.
C. Test statistic: t = 1.607. Critical values: t = ±2.947.
D. Test statistic: t = 1.607. Critical values: t = 2.947.

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