A national research study seeks to determine the average number of miles people over age 75 walk each day. To collect the data, several research workers each randomly call 10 people who are over 75 in communities across the country and ask how many miles they walked the previous day.
Here are the data for one worker's sample:
1.5 0 2 0 1.5 2.5 0 3.5 5 2
What is the mean distance people in this survey walked?
miles