2.38 Public transportation—outlier Refer to the previous exercise.

a. Use the Mean Versus Median app (see Activity 1) to investigate what effect adding the outlier of 90 to the data set has on the mean and median. (In the app, select “Supply own sample” and type the data plus the value 90 into the textbox.)

b. Now add 10 more data values that are near the mean of 2 for the original 10 observations. Does the outlier of 90 still have such a strong effect on the mean?