Post by: ereecah on Dec 3, 2019
Question 1
A work sampling study requires an acceptable error level of 10% and 95% confidence. a. What is the adequate sample size if the sample proportion is as large as 50%? b. What is the adequate sample size if the sample proportion is estimated to be about 20%?Question 2
In a preliminary work sample of an operation, out of 50 observations the operator was observed idle in 5 observations. What sample size is required for a work sampling study if the desired confidence level is 98% and the desired accuracy level is 5%?Post by: bblaney on Dec 3, 2019
Answer 1
a. 1.962 × .5 × .5 / .12 = 98b. 1.962 × .2 × .8 / .12 = 61.46 or 62
Answer 2
n =
= 
= 195.4 or 195
Post by: Nana Adwoa on Aug 3, 2022