A quality control inspector randomly selected 40 phones to be tested at the Y-Phone Factory. The researcher dropped each phone from a height of a table onto a concrete surface and found only 15 of the phones had the glass surface break Based on this test what is the probability that the glass won't break on the next test?
0.375
O 0.415
0.395
O 0.355

The number of chocolate chips in a bag of chocolate chip cookies is approximately normally distributed with a mean of 12611261 chips and a standard deviation of 118118 chips. (a) determine the 2626th percentile for the number of chocolate chips in a bag. (b) determine the number of chocolate chips in a bag that make up the middle 9696% of bags. (c) what is the interquartile range of the number of chocolate chips in a bag of chocolate chip cookies?