Question

A firm producing plate glass has developed a less expensive tempering process to allow for fireplaces to rise to a higher temperature without breaking. To test it, five different plates of glass were drawn randomly from a production run, then cut in half, with one-half tempered by the new process, and the other half by the old. The two halves then were heated until they broke, yielding the following data:

Breaking Temperature
New	Old
475	485
436	438
495	493
483	486
426	433

Does the new process show significant improvement over the old process? Assume 5% significance level. (Please specify the null and alternative hypotheses carefully)

Answer 1