sis about a mean using the critical value method. . [7 points] [Example: Hypothesis Test (Critical Value)] A computer software vendor claims that a new version of their operating system will crash less than seven times per year on average. A system administrator installs the operating system on a random sample of 41 computers. At the end of a year, the sample mean number of crashes is 8.1, with a standard deviation of 3.9. Can you conclude that the vendor's claim is false? Use the = 0.05 significance level. Degrees of Area in the Right Tail Freedom 0.10 0.05 0.025 39 1.304 1.685 2.023 40 1.303 1.684 2.021 50 1.299 1.676 2.009 [Hints: In Calculator to find "t" Use: STAT->Tests->Ttest->Stats-> ( X, S_X, n, : o >o Calculate. If t ta we reject Ho. If t