A local police department near a large mall has decided to step up traffic enforcement during the months of November and December this year. They are concerned that the number of people speeding has...

A local police department near a large mall has decided to step up traffic enforcement during the months of November and December this year. They are concerned that the number of people speeding has increased this year. The number of speeding violations for 11 randomly selected days was recorded. Here are the results for those 11 randomly selected days.

13     8      10      10      4      17     9     16      10     12      12

a. Construct a 90% confidence interval for μμ = the true mean number of speeding violations given out daily during the months of November and December.

b. Interpret the confidence interval.