Solve the Problem. -A Survey of 1,981 Credit Card Users Indicated That 911

question 49

Multiple Choice

Solve the problem.
-A survey of 1,981 credit card users indicated that 911 had bought books online, 876 had bought musiconline, 439 had bought pet supplies online, 139 had bought both books and music, 200 had bought bothbooks and pet supplies, 160 had bought both music and pet supplies, and 93 had bought all three. Howmany credit card users did not buy any of the three? How many bought either books or pet supplies butnot music?

• A)161; 944
• B)254; 837
• C)161; 837
• D)161; 930

---

Definitions:

Data Collection

The process of gathering and measuring information on variables of interest in a systematic fashion.

Random Assignment

A method used in experiments to assign subjects randomly to either the treatment or control group to eliminate bias.

Independent Variable

The factor in an experiment that is deliberately changed or manipulated to observe its effect on a dependent variable.

Equal Chance

A principle whereby each subject or experimental unit in a study has the same probability of being assigned to a particular group or condition.