Let’s go back and look at the hospital data from Module (WK1HW_HOSPITAL.XLSX).
We want to compare the mean hospital stay in a Pennsylvania hospital and the mean hospital stay in a typical U.S. hospital. It is unknown whether the hospital stay in the Pennsylvania hospital is longer or shorter than a hospital stay in a typical U.S. hospital.
Assume the duration of a hospital stay in the U.S. is normally distributed and the mean is 11.5 days. So, is the mean hospital stay in Pennsylvania different from the mean hospital stay in a typical U.S. hospital?
• State the null and alternative hypotheses.
• What is your statistical test and why?
• What were your statistical test results? What is your conclusion?
QUESTION 1:
What is the power of such a study if a two-sided test is to be used with α = .05? (use decimal, not percent)
QUESTION 2:
What were the null and alternative hypotheses?
QUESTION 3:
How many people would need to be studied to have 80% power under the assumptions in above? (Use a whole number)
QUESTION 4:
What are the null and alternative hypotheses?
QUESTION 5:
Compute the lower and upper 95% Cl for the true mean cholesterol level in this group (use 1 decimal place).
QUESTION 6:
What type of complementary information is provided by the hypothesis test and Cl in this case?
QUESTION 7:
State the hypotheses to use in answering this question.
QUESTION 8:
Is a one-sided or two-sided test appropriate here? Please explain your answer.
QUESTION 9:
Let's start by stating the null and alternative hypotheses. Also, what is your test statistic and why?
QUESTION 10
Continuing with the hospital data from Module, what were your test statistics results? What is your conclusion.
Let's go back and look at the hospital data from Module.
We to compare the mean hospital stay in a Pennsylvania hospital and the mean hospital stay in a typical U.S. hospital. It is unknown whether the stay in a Pennsylvania hospital is longer or shorter than a stay in a typical U.S. hospital.
Assume the duration of a hospital stay in the U.S. is normally distributed and the mean is 11.5 days. So, is the mean hospital stay in Pennsylvania different from the mean hospital stay in a typical U.S. hospital?
Attachment:- wk1hw_hospital.xls