Question: To get a 0 . 1 0 interval on work observed by work sampling that is estimated to require 7 0 % of the worker's

To get a 0.10 interval on work observed by work sampling that is estimated to require 70% of the worker's time, how many random observations will be required at the 95% confidence level? (Hints: example 2.13, simply use the right formula in the slides)
To get a 0.10 interval on work observed by work sampling

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