Question

21.

Lung cancer remains as the top killer of cancer types in the United States. In order to understand the causes, and help formulate new treatments for the disease, the researchers matched each lung cancer patient with a person of the same age, sex, and gender, but who is not suffering from the disease. The researchers compared the lifestyle characteristics of the two groups. This is an example of ____________. Select the best answer.

Question 21 options:

A)	Double-blind Randomized Controlled Experiment

B)	Randomized Controlled Experiment

C)	Retrospective Study

D)	Prospective Study

E)	Unable to determine

22.

Consider the following data as a sample from a population: 2, 5, 5, 8, 10, 10. What is the sample standard deviation?

Question 22 options:

A)

2.92

B)

3.20

C)

10.24

D)

5.86

E)

8.74

23.

Suppose the mean birthweight in the U.S. is normally distributed with mean 120 oz. and standard deviation is 24 oz. What percent of babies will weigh 160 oz. or less?

Question 23 options:

A)

95.25%

B)

18.12%

C)

62.31%

D)

37.69%

E)

4.75%

24.

A study was conducted to determine if tanning beds cause skin cancer. A group of individuals who regularly use tanning beds were considered as the treatment group, while another group of individuals who do not use tanning beds were considered as the control group. The two groups were followed over time to determine if there is an association between regular use of tanning beds and the develop of skin cancer. This is an example of a_____.

Question 24 options:

A)	Clinical Trial

B)	Randomized Controlled Experiment

C)	Retrospective Study

D)	Prospective Study

E)	None of the above

Answer 1