Answer:
The answer would be 7 3/4
Step-by-step explanation:
Answer:
4.5
Step-by-step explanation:
7/10 - 1/4 use common denominators
28/40 - 10/40 = 18/40 = 9/20
Find the mean of the first four test scores first.
(Add all numbers in set and divide by how many numbers there are)
81 + 87 + 71 + 89 = 328 / 4 = 82
Then, find the mean with the 85 added as the fifth term.
81 + 87 + 71 + 89 + 85 = 413 / 5 = 82.6
The impact that the 85 had on the mean test score was that the mean/average increased by 0.6.
