IF The accompanying table shows the frequency distribution for the mileage on a sample of a certain rental company's rental cars. If appropriate, use midpoints of ranges in nding approximate values Complete parts a and b E] Click the icon to View the frequency distribution for the mileage on the sample of cars. a. Calculate the approximate average mileage per car for the sample. The approximate average mileage for the sample is D (Round to the nearest integer as needed.) b. Calculate the approximate variance and standard deviation for the sample The approximate variance for the sample is El. (Round to the nearest integer as needed.) The approximate standard deviation for the sample is I] (Round to the nearest integer as needed.)