A 2009 study indicated that large population of Canadian doctors reported, on average, a total of 281 minutes per week of exercise with a standard deviation of sigma= 14.53 minutes per week. Today, you take a random sample of n=20 doctors in Canada and ask them to report their minutes of exercise per week, and find a sample mean of xbar 287.25 minutes per week.

Create a 90% confidence interval for the average weekly minutes of exercise of doctors in Canada today. At the 10% significance level, is there evidence that the average weekly minutes of exercise for Canadian doctors has changed from 281 minutes? Fill in the table and the brackets below. Z problem

Conf Level	Signif Level	Conf Interval
Summary Statement
English Statement (Choose answer)