Some descriptive statistics for a Set of test scores are shown above for this test a certain student has a standardized score of

Question

2 years ago

9

z=-1.2 what score did the student receive on the test

1 answer:

Serggg [28] · Answer 1 · 2021-11-26T13:08:27+03:00

Complete Question

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Answer:

The score of the student is x = 779.42

Step-by-step explanation:

Generally we can mathematically represent the z-score as

$z = \frac{x - Mean}{ stDev}$

Here x is the score of the student

substituting 1045.7 for the Mean, 221.9 for the stDev and -1.2 for z we have

$-1.2 = \frac{x - 1045.7 }{ 221.9}$

=> $-266.28 = x -1045.7$

=> x = -266.28 + 1045.7

=> x = 779.42