A total of 300 observatio ns o f Bob R amos, an assembly-line worker, were made over a 40-hour workweek. The sample a lso showed that Bob was busy working (assembling theparts) during 250 observations.a) Find the percentage of time Bob was working.b) If you want a confidence level of95%, and if ±3% is an acceptable error, what size should the sample be?c) Was the sample size adequate?

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A total of 300 observatio ns o f Bob R amos, an assembly-line worker, were made over a 40-hour workweek. The sample a lso showed that Bob was busy working (assembling the
parts) during 250 observations.
a) Find the percentage of time Bob was working.
b) If you want a confidence level of95%, and if ±3% is an acceptable error, what size should the sample be?
c) Was the sample size adequate?
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