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 20 percent.

A) 50;20
B) 100;64
C) 100;16
D) 20;50
E) 200;80