Q. 7

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 differs in variability in the seventh month and the first month after installation? Let SD 1 denote the variability in time to freeze-up in the first month after installation. Use the a = 0.10 level and the critical value method with the table.

One month: 244.4 245.3 207.4 233.1 215.9 235.1

Seven months: 246.2 149.4 156.4 103.3 84.3 53.2

Part 1 of 5

Find the critical value. Round the answer to two decimal places.

The critical value f 0.05 is