In a preliminary work sample of an operation, out of 50 observations the operator was observed idle in 10 observations. What sample size is required for a work sampling study if the desired confidence level is 95% and the desired accuracy level is ± 5%?

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The Answer of In a preliminary work sample of an operation, out of 50 observations the operator was observed idle in 10 observations. What sample size is required for a work sampling study if the desired confidence level is 95% and the desired accuracy level is ± 5%?

In a Preliminary Work Sample of an Operation, Out of 50