A sample of 100 transistors is randomly chosen from a large batch and tested to determine if they meet the current standards. If 80 of them meet the standards, then an approximate 95 percent confidence interval for p, the fraction of all the transistors that meet the standards, is given by

That is, with “95 percent confidence,” between 72.16 and 87.84 percent of all transistors meet the standards

Transcribed Image Text:

(.8 1.96.8(.2)/100, .8 +1.96.8(.2)/100) = (.7216, .8784)