If you wish to estimate the proportion of engineers and


If you wish to estimate the proportion of engineers and scientists who have studied probability theory and you wish your estimate to be correct, within 2 %, with probability 0.95 or better, how large a sample should you take (i) if you feel confident that the true proportion is less than 0.2, (ii) if you have no idea what the true proportion is.

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Basic Statistics: If you wish to estimate the proportion of engineers and
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