In the study of perception, 147 men are tested and 17 are found to have red/green color blindness.
(a) Determine a 93% confidence interval for true proportion of men from sampled population which have this kind of color blindness.
(b) Using results from above mentioned survey, how many men should be sampled to estimate the true proportion of men with this type of color blindness to within 1% with 97% confidence?
(c) If no previous estimate of the sample proportion is available, how large of a sample should be used in(b)?