What is the mean absolute deviation for the data set?

{10, 15, 18, 20, 24}

3.92

3.95

4.01

4.20

Suppose that prices of a gallon of milk at various stores in one town have a mean of $3.71 with a standard deviation of $0.10. using chebyshev's theorem, what is the minimum percentage of stores that sell a gallon of milk for between $3.41 and $4.01? round your answer to one decimal place.