Question

Here are the science test scores from Ms. O’Donnell’s class:55, 60, 70, 70, 75, 75, 75, 80, 80, 85, 85, 85, 85, 90, 90, 95, 100Find the MAD.(1 point)The MAD is...

Answer 1

wrong

Answer 2

9.06.

Answer 3

Apologies for the error in my previous response. Let's calculate the Mean Absolute Deviation (MAD) correctly:
1. Calculate the mean:
(55 + 60 + 70 + 70 + 75 + 75 + 75 + 80 + 80 + 85 + 85 + 85 + 85 + 90 + 90 + 95 + 100) / 17 = 80.88

2. Find the deviations from the mean for each score:
|55 - 80.88| = 25.88
|60 - 80.88| = 20.88
|70 - 80.88| = 10.88
|70 - 80.88| = 10.88
|75 - 80.88| = 5.88
|75 - 80.88| = 5.88
|75 - 80.88| = 5.88
|80 - 80.88| = 0.88
|80 - 80.88| = 0.88
|85 - 80.88| = 4.12
|85 - 80.88| = 4.12
|85 - 80.88| = 4.12
|85 - 80.88| = 4.12
|90 - 80.88| = 9.12
|90 - 80.88| = 9.12
|95 - 80.88| = 14.12
|100 - 80.88| = 19.12

3. Find the mean of the absolute deviations:
(25.88 + 20.88 + 10.88 + 10.88 + 5.88 + 5.88 + 5.88 + 0.88 + 0.88 + 4.12 + 4.12 + 4.12 + 4.12 + 9.12 + 9.12 + 14.12 + 19.12) / 17 = 8.927

Therefore, the Mean Absolute Deviation (MAD) is approximately 8.93.