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Frozen computer: A computer system administrator noticed that computers running a particular operating system seem to freeze up more often as the installation of the
Frozen computer: A computer system administrator noticed that computers running a particular operating system seem to freeze up more often as the installation of the operating system ages. She measures the time (in minutes) before freeze-up for 6 computers one month after installation and for 6 computers seven months after installation. The results are shown. Can you conclude that the time to freeze-up is less variable in the seventh month than the first month after installation? Let G, denote the variability in time to freeze-up in the first month after installation. Use the d = 0.05 level and the critical value method with the table. One month: 207.4 233.1 215.9 235.1 225.6 244.4 Seven months: 156.4 103.3 84.3 53.2 127.3 201.3 Send data to Excel State the null and alternate hypothesis. H: 0 0=0 H, This is a (Choose one) test. X 5 Find the critical value. Round the answer to two decimal places. The critical value fo.05 is X 5 Compute the test statistic. Round the answer to two decimal places. F X 5Determine whether to reject H. (Choose one) the null hypothesis H. Reject X 5 Do not reject Part: 4 / 5 State a conclusion. There (Choose one) |enough evidence to conclude that the time to freeze-up is less variable in the seventh month than in the first month after installation. X 5
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