Answer:
Explanation:
How to Find a Sample Size Given a Confidence Interval and Width (unknown population standard deviation)
za/2: Divide the confidence interval by two, and look that area up in the z-table: .95 / 2 = 0.475. ...
E (margin of error): Divide the given width by 2. 6% / 2. ...
: use the given percentage. 41% = 0.41. ...
: subtract. from 1.
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Sample Size in Statistics (How to Find it): Excel, Cochran's Formula ...
