MacroSwift has designed a new operating system that will revolutionize the computing industry. The only problem is, the company expects the average amount of time required to learn the software to be 124 hours. Even though this is a long educational time, the company is truly concerned with the variance of the learning time. Preliminary data indicate the variance is 171 hours squared. Recent testing of 25 people found an average learning time of 123 hours and a sample variance of 196.5 hours squared. Do these data indicate the variability in learning time is different from the previous estimate? Test your hypotheses at the 0.02 significance level.
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