A PC manufacturer claims that no more than 5% of their machines are defective. In a random sample of 100 machines, it is found that 8.5% are defective. The manufacturer claims this is a fluke of the sample. At a .02 level of significance, test the manufacture’s claim, and explain your answer.. MegaStat Output Hypothesis test for proportion vs. hypothesized value Observed Hypothesized .085 .05 p (as decimal) 9/100 5/100 p (as fraction) 8.5 5.0 x 100 100 n 0.0218 std. error 1.61 Z .0541 p-value (one-tailed, upper)
Our null hypothesis is
H0: p=5%
H1: p<5%