Question

Find the MAD of the following test scores: 70, 75, 75, 78, 80 what is the mean

Answer 1

[AI-generated answer — Bot GPT 3.5]

To find the MAD (mean absolute deviation) of the test scores, we need to first find the mean of the scores.

Mean = (70 + 75 + 75 + 78 + 80) / 5
Mean = 378 / 5
Mean = 75.6

Next, we find the absolute deviations from the mean:
|70 - 75.6| = 5.6
|75 - 75.6| = 0.6
|75 - 75.6| = 0.6
|78 - 75.6| = 2.4
|80 - 75.6| = 4.4

Now, we find the MAD by calculating the average of these absolute deviations:
MAD = (5.6 + 0.6 + 0.6 + 2.4 + 4.4) / 5
MAD = 13.6 / 5
MAD = 2.72

Therefore, the MAD of the test scores is 2.72.