A Manager Who Is Conducting a Time Study Now Needs

Multiple Choice

A manager who is conducting a time study now needs an accuracy of ±0.1 minutes, rather than ±0.2 minutes as in the past. Because of this change in accuracy, the adequate sample size becomes

A) one-fourth as large.
B) one-half as large.
C) twice as large.
D) four times as large.
E) eight times as large.