In a random sample of 20 people, the mean commute time to wo…

Questions

In а rаndоm sаmple оf 20 peоple, the mean commute time to work was 15.5 minutes with a standard deviation of 2.2 minutes.  Based on this information, construct a 95% confidence interval for the mean commute time to work, if the commute times are considered to come from a normally distributed population.  Give your final answers rounded to two decimal places, no spaces, and in (lower,upper) format. 

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