Question

The Student Recreation Center wanted to determine what sort of physical activity was preferred by students. In a survey of 96 students, 62 indicated that they preferred outdoor exercise over exercising in a gym. When estimating the proportion of all students at the university who prefer outdoor exercise with 90% confidence, what is the margin of error?

Question 4 options:

	1) 0.0801
	2) 0.0625
	3) 0.0488
	4) 0.0082
	5) 0.0039

Suppose you work for a pharmaceutical company that is testing a new drug to treat ulcerative colitis. You conduct a random sample of 26 patients on the new drug and 13 of them indicated a decrease in symptoms since starting the drug regimen. You construct a 95% confidence interval for this proportion to be ( 0.3078 , 0.6922 ). What is the correct interpretation of this confidence interval?

Question 5 options:

	1) We are 95% confident that the proportion of all patients on the drug regimen that have experienced a reduction in symptoms is between 0.3078 and 0.6922.
	2) We are certain that 95% of patients will be between 0.3078 and 0.6922.
	3) We are 95% confident that the proportion of patients surveyed that have experienced a reduction in symptoms is between 0.3078 and 0.6922.
	4) We cannot determine the proper interpretation of this interval.
	5) We are 95% confident that the proportion of patients who should be on this drug is between 0.3078 and 0.6922.

Suppose you want to determine the average height of college basketball players in NCAA Division I. In a random sample of 14 players, the sample average is 74.251 inches with a standard deviation of 5.6756 inches. What is the 90% confidence interval for the average height of all NCAA D-I players?

Question 6 options:

	1) ( -71.565 , 76.937 )
	2) ( 72.734 , 75.768 )
	3) ( 72.48 , 76.022 )
	4) ( 71.58 , 76.922 )
	5) ( 71.565 , 76.937 )

Answer 1

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