The Engineering Department at Sims Software Inc. recently developed two chemical solutions designed to increase the usable life of computer disks.

A sample of disks treated with the first solution lasted 86, 88, 66, 83, 84, 81, 94, 109, 65, and 102 hours.

Those treated with the second solution lasted 91, 71, 75, 76, 77, 79, 73, 76, 79, 78, 87, 80, 76, and 72 hours.

Assume the population standard deviations are the same.

At the .05 significance level, can we conclude that there is a difference in the length of time the two types of treatment lasted?

What is the average usable life of the disks for First Solution (round to four decimals)? ________

What is the average usable life of the disks for Second Solution (round to four decimals)? ________

The computed test statistic for the sample above is ________ (round to 4 decimals).

At the 0.05 significance level, what is the critical value for testing the null hypothesis? _________

What is the p-value for the test? _____________ (round to 4 decimals).

At the 0.05 significance level, what is the correct statistical conclusion?

Based on the result of the statistical test above, which of the following would be the correct conclusion?