I need help to complete the below... not sure how to get to the answer.

Below was the task:

Think about a population mean that you may be interested in and propose a hypothesis test problem for this parameter. Gather appropriate data and post your problem, Later, respond to your own post with your own solution.

For example, you may believe that the population mean number of times that adults go out for dinner each week is less than 1.5. Your data could be that you spoke with 7 people and found that they went out 2, 0, 1, 5, 0, 2, and 3 times last week. You then would choose to test this hypothesis at the .05 (or another) significance level. Assume a random sample.

Below was my problem:

I will be testing the population mean number of miles driven to work (one way) by my circle of friends and coworkers.I believe that in this sample group that the average miles driven from their homes to their offices is less than 15 miles. My data will be a survey of the 10 closest friends and coworkers.

The 10 responses were as follows for the average miles driven from their homes to their employer/office: 12,10,18,25,5,8,15,4.5 & 10. I will test this hypothesis at the .05 significance level. Assume a random sample.

And I need help to solve, not sure how to get there.