How large a sample must be drawn to estimate population proportion confidence interval width to within .04, with 95% confidence, if we believe the true percentage is 80%

Sample size 'n' = 384

Step-by-step explanation:

Explanation:-

Given margin of error = 0.04

The sample proportion 'p'= 0.80

The margin of error is determined by

Cross multiplication, we get

                             √n = 19.6

Squaring on both sides , we get

                            n = 384.16≅384

answ5

step-by-step explanation:

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