Question

Suppose you want to determine the average height of college basketball players in NCAA Division I. In a random sample of 9 players, the sample average is 70.725 inches with a standard deviation of 4.4081 inches. What is the 95% confidence interval for the average height of all NCAA D-I players?

Question 6 options:

	1) ( 67.401 , 74.049 )
	2) ( 69.256 , 72.194 )
	3) ( 67.337 , 74.113 )
	4) ( -67.337 , 74.113 )
	5) ( 68.419 , 73.031 )

A new drug to treat high cholesterol is being tested by pharmaceutical company. The cholesterol levels for 8 patients were recorded before administering the drug and after. The mean difference in total cholesterol levels (after - before) was 24.523 mg/dL with a standard deviation of 19.3919 mg/dL. Create a 90% confidence interval for the true average difference in cholesterol levels by the drug.

Question 9 options:

	1) (17.6669, 31.3791)
	2) (22.6284, 26.4176)
	3) (-11.5336, 37.5124)
	4) (11.7738, 37.2722)
	5) (11.5336, 37.5124)

A suggestion is made that the proportion of people who have food allergies and/or sensitivities is 0.57. You believe that the proportion is actually greater than 0.57. The hypotheses for this test are Null Hypothesis: p ≤ 0.57, Alternative Hypothesis: p > 0.57. If you select a random sample of 21 people and 10 have a food allergy and/or sensitivity, what is your test statistic and p-value?

Question 11 options:

	1) Test Statistic: -0.868, P-Value: 0.807
	2) Test Statistic: 0.868, P-Value: 0.193
	3) Test Statistic: -0.868, P-Value: 0.193
	4) Test Statistic: 0.868, P-Value: 0.807
	5) Test Statistic: -0.868, P-Value: 1.614

Answer 1

The statistical software output for this problem is :

(6)

The 95% confidence interval for the average height of all NCAA D-I players is :

( 67.337 , 74.113 )

Option 3)

(9)

A 90% confidence interval for the true average difference in cholesterol levels by the drug

is :

(11.5336, 37.5124)

Option 5)

11)

Test Statistic: -0.868, P-Value: 0.807