Confidence interval estimate of the population mean examin

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Reference no: EM1317712

Q. Western University the historical mean of scholarship examination scores for freshman applications is 900. A historical population standard deviation s=180 is assumed known each year, the assistant dean uses a sample of applications to determine whether the mean examination score for the new freshman applications has changed.

- State the hypotheses

- Illustrate what is the 95% confidence interval estimate of the population mean examination score if a sample of 200 applications provided a sample mean of Xbar=935 ?

- Use the confidence interval to conduct a hypothesis test. Using a=.05, Illustrate what is your conclusion?

- Illustrate what is the p-value?

Reference no: EM1317712

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