Question

A study was conducted to determine the effectiveness of a speed limit sign. The speeds of cars at the 65 mph sign were:
58, 60, 65, 65, 70, 70, 71, 74, 85, 88

Answers

GPT 3.5
The mean speed of cars at the 65 mph speed limit sign is calculated by adding up all the speeds and dividing by the total number of speeds:

58 + 60 + 65 + 65 + 70 + 70 + 71 + 74 + 85 + 88 = 676

676 / 10 = 67.6

Therefore, the mean speed of cars at the 65 mph speed limit sign is 67.6 mph.