KingSulay
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Please help will mark brainliest!! 15 POINTS!!
The data set, {81, 87, 71, 89}, represents Ken's test scores for the first four tests of the semester. Ken scored an 85 on the fifth test.

What impact does the 85 have on the mean test score?

Please help will mark brainliest 15 POINTS The data set 81 87 71 89 represents Kens test scores for the first four tests of the semester Ken scored an 85 on the class=

Respuesta :

alexanderperezii
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.

Answer:

decrease

Step-by-step explanation:

If 89 is the highest score, Ken would need a score of 90+ to increase the mean.

[tex]Md < 89\\Mi >89[/tex]

Md = mean decreases

Mi = mean increases

Hope this helped!

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