Question

[Questions 1-9]. Suppose a researcher wants to know if the average systolic blood pressure in African Americans is different from the averagesystolicblood pressure in the general population.Note that the average systolic blood pressure in the general population is 120 mmHG.The researcherrecruits25 African Americans into this particular study and then measureseach of their systolic blood pressures (mmHG).The sample mean blood pressure is123with a sample standard deviation of 5.0.Note that we DO NOT KNOW the population standard deviation of blood pressures (σ). Using a t-procedure, testat the 5% significance levelwhether themeansystolic blood pressurein African Americansis significantly different than the mean systolic blood pressure in the general population.

Question 1: The null hypothesis is H0: μ= μ0. What is μ0?a. 25b. 120c. 123d. 5.0

Question 2: What is the alternative hypothesisfor this test?a. H0: μ= μ0b.H0: μ< μ0c. H0: μ> μ0d. H0: μ≠μ0

Question 3: What is the estimated standard error of the sample mean(???̅)?(Note this is the denominator of the test statistic).a. 5b. 25c. 5/25d. 5/sqrt(25)

Question 4: What is the test statistic?a. (123-120)/???̅b. (120 -123)/???̅c. (25 -120)/???̅d. (120 -25)/???̅Question 5: What is the degrees of freedom?a. 4b. 5c. 24d. 25

Question 6: Which two values is the p-value between?a.0.001 and 0.002b.0.002 and 0.005c.0.005 and 0.01d.0.01 and 0.02

Question 7: What is your alpha?a. 0.01b. 0.05c. 0.10d. 0.15

Question 8: Do you reject H0(the null hypothesis)?a. Yesb. No
Question 9: What do you conclude?a.The average systolic blood pressure in African Americans is differentthanthe averagesystolicblood pressure in the general populationb. The average systolic blood pressure in African Americans is no differentthanthe averagesystolicblood pressure in the general population

Answer 1