10.101 Forty-one small lots of experimental product were manufactured and tested for the occurrence of a particular indication that is attribute in nature yet causes rejection of the part. Thirty-one lots were made using one particular processing method, and ten lots were made using yet a second processing method. Each lot was equally sampled

(n  32) for the presence of this indication. In practice, optimal processing conditions show little or no occurrence of the indication. Method 1, involving the ten lots, was run before Method 2.

Methods n Number of Rejects Method 1 320 4 Method 2 992 26 Courtesy of Bausch & Lomb Determine, at the 0.05 level of significance, whether there is a difference in the proportion of reject product between the two methods. (Save your answer for comparison with Exercises 11.44 on p. 645.)