roygbiv1233
31.03.2021 •
Mathematics
On a standardized exam, the scores are normally distributed with a mean of 135 and a standard deviation of 20. Find the Z-score of a person who scored 115 on the exam.
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Ответ:
-1
Step-by-step explanation:
mean, mu = 135.
Standard deviation = 20
X = 115
use the z score formula :
to get (115-135)/20 = -1
Ответ:
hope this helped!!
~Melany~ ;)