For the data in Exercise, what is the minimum number of observations that must be altered so that the 20% trimmed mean is greater than 1000?
Exercise
For the observations
21, 36, 42, 24, 25, 36, 35, 49, 32
verify that the sample mean, 20% trimmed mean, and median are X¯ = 33.33, X¯ t = 32.9, and M = 35.