A Work Sampling Study Requires an Acceptable Error Level of 10

Multiple Choice

A work sampling study requires an acceptable error level of 10 percent and z = 2 for 95.45 percent confidence. The adequate sample size is ________ if the sample proportion is thought to be as large as 50 percent, but ________ if the sample proportion is thought to be about 10 percent.

A) 50; 20
B) 100; 64
C) 100; 16
D) 20; 50
E) 100; 36