Question

Two different types of polishing solutions are being evaluated for possible use in a tumble-polish operation for manufacturing intraocular lenses used in the human eye following cataract surgery. Three hundred lenses were tumble-polished using the first polishing solution and of this number, 253 had no polishing-induced defects. Another three hundred lenses were tumble-polished using second polishing solution, and 196 lenses were satisfactory upon completion. We need to see if there is any reason to believe that the two polishing solutions differ.

b.What is the appropriate statistical test procedure to test the hypotheses?

c.Construct a 95% Confidence Interval for the difference of the two proportions and test the hypotheses. Clearly interpret the test results.

d.Test the hypotheses using the test statistic/critical value method. Do you get the same answer as part (c)?

e.What is the ? ????? of the test? Test the hypotheses using the ? ?????. Do you get the same answer as parts (c) and (d)?

Answer 1