# A public health major wants to estimate the proportion of students that watch network news on...

###### Question:

A public health major wants to estimate the proportion of students that watch network news on a regular basis. She has no previous knowledge and doesn't want to guess about this proportion. Assuming the worst-case-scenario, how large of a random sample (n) does she need to take if she wants the estimate to be within 0.07 of the true population value with 90% confidence? On=138 On=139 but 40 should be used On=139 On=138 but 40 should be used

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