Construct a normal probability plot of the O-ring joint temperature data in Exercise 6-13. Does it seem reasonable to assume that O-ring joint temperature is normally distributed? Discuss any interesting features that you see on the plot.

Test Statistic measures how far the sample data diverge from what we would expect should the null hypothesis be true So, a test statistic with a high magnitude would show that the date is not consistent with H o P-values the probability (when H0 I true) that the test statistic takes a value that is as extreme or more extreme than what is observed A small p value means stronger evidence against Ho provided by the data, and you reject the null hypothesis Significance levels Denoted by Used as evidence for or against H 0 If a p value is smaller than , we reject H o If the p value is larger that , we fail to rejectoH If a significance level is not given, always assume = .05