A researcher randomly selects 100 students from each of four

A researcher randomly selects 100 students from each of four colleges and records the number who smoke. The results are shown below.
                               College A          College B                College C               College D
Smokes                   17                 26                               11                            34

Doesn\'t Smoke        83                74                             89                            66

Estimate the difference in the proportion who smoke at College A versus College C. Interpret.

.-0.31; the proportion of students who smoke is estimated to be 0.31 less at College A than at College C.

.0.08; the proportion of students who smoke is estimated to be 0.08 greater at College A than at College C.

C.-0.17; the proportion of students who smoke is estimated to be 0.17 less at College A than at College C.

.0.03; the proportion of students who smoke is estimated to be 0.03 greater at College A than at College C.

E.0.06; the proportion of students who smoke is estimated to be 0.06 greater at College A than at College C.

Solution

B

.0.08; the proportion of students who smoke is estimated to be 0.08 greater at College A than at College C. is the answer