Following are the speeds of 40 cars clocked by radar on a particular road in a
35-mph zone on a particular afternoon:
30, 36, 42, 36, 30, 52, 36, 34, 36, 33, 30, 32, 35, 32, 37, 34, 36, 31, 35, 20,
24, 46, 23, 31, 32, 45, 34, 37, 28, 40, 34, 38, 40, 52, 31, 33, 15, 27, 36, 40
And your question is?
If you are looking for the mean, add the scores and divide by the number of scores.
To find the average speed of the cars, you need to add up all the speeds and divide by the total number of cars.
First, add up all the speeds:
30 + 36 + 42 + 36 + 30 + 52 + 36 + 34 + 36 + 33 + 30 + 32 + 35 + 32 + 37 + 34 + 36 + 31 + 35 + 20 + 24 + 46 + 23 + 31 + 32 + 45 + 34 + 37 + 28 + 40 + 34 + 38 + 40 + 52 + 31 + 33 + 15 + 27 + 36 + 40 = 1346
Next, count the total number of cars. In this case, there are 40 cars.
Finally, divide the sum of the speeds by the total number of cars:
1346 / 40 = 33.65
Therefore, the average speed of the cars on that particular afternoon is 33.65 mph.