A professor believes the variability in time to complete tests has increased. In the past, the variance in minutes to complete a particular test was 25. The time it takes to complete a test was recorded for a sample of 15 students. The results follow. 
Use Excel to determine if the variance in times has increased. Use a .02 level of significance.
Definitions:
Adjusting Entries
At the close of a fiscal period, entries recorded to assign revenue and costs to the actual period of occurrence.
Advance Rent
Prepaid rent, which is an amount paid prior to the period to which it relates, often accounted for as a current asset until the period to which the rent applies.
Utility Bill
A bill sent by a utility company (electricity, gas, water, etc.) charging the customer for their usage of the service.
Insurance Salesman
A professional who specializes in selling insurance policies to individuals and businesses, advising on coverage options and terms.
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