Twenty volunteers were assigned at random to one of two groups ...

[laurencescou]

Twenty volunteers were assigned at random to one of two groups (10 people in each group). One group would take Vitamin C for two weeks, while the second group would take a placebo. At the end of the study, the proportion of colds in the two groups will be compared. What is the explanatory variable in the study?
 a. Getting a cold (or not)
  b. Taking Vitamin C (or a Placebo)
  c. Getting 8 hours of sleep a night (or not)
  d. Exposure to other people with colds (or not)

Question 2

Twenty volunteers were assigned at random to one of two groups (10 people in each group). One group would take Vitamin C for two weeks, while the second group would take a placebo. At the end of the study, the proportion of colds in the two groups will be compared. What is the response variable in the study?
 a. Getting a cold (or not)
  b. Taking Vitamin C (or a Placebo)
  c. Getting 8 hours of sleep a night (or not)
  d. Exposure to other people with colds (or not)

[macagn]

Answer to Question 1

B

Answer to Question 2

A

[laurencescou]

Thanks for the timely response, appreciate it

[helenmarkerine]

Wow, this really help