Use the grouped data formulas to find the indicated mean or

Last updated: 3/7/2023

Use the grouped data formulas to find the indicated mean or standard deviation The speeds of a random sample of 100 cars are recorded as they pass a highway checkpoint The results are summarized in the frequency distribution below Approximate the sample mean Speed mph Cars 30 39 6 40 49 15 50 59 51 60 69 15 70 79 13 O 55 9 mph 58 7 mph O 54 5 mph 61 5 mph