Question

After the researchers see the number of subjects they will have to interview, they reexamine their criteria. The researchers could decrease the number of subjects while having the least impact on the reliability of the study by ___________.A. increasing p and decreasing B.
B. increasing p or decreasing B.
C. decreasing p and increasing B.
D. decreasing p or increasing B.

Answer 1

Answer:

D. decreasing p or increasing B.

Explanation:

From the formula presented for the sake of answering this question as shown below:

n = Np (1-p)/ (N-1)B squared/4 + (p) (1-p)

Hence, the number of subjects can be reduced while having the least impact of the study reliability if we decrease the proportion of subjects needed (p) or increase the acceptable amount of error (B). This way, the study still remains reliable.