A computer memory manufacturer specifies that its memory chip stores data incorrectly an average of 6.3 out of 10 million cycles with a standard deviation of 0.48. A batch of 30 chips your company ordered stores data incorrectly an average of 6.9 times per 10 million cycles. You want to know if your batch is different from the population of computer chips at the factory.

Go through the steps for hypothesis testing, figuring out which statistic to use and spelling out each step along the way. Employ alpha = 0.05, and figure out whether you need to do a 1-tailed or 2-tailed test based on the research question.