A test is administered annually. The test has a mean score of 150 and a standard deviation of 20. If Ravi’s z-score is 1.50, what was his score on the test?
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Ravi's score on the test was 180
Given that, the mean score in the test (μ) = 150
Standard deviation (σ) = 20
z-score (Z) = 1.50
We know that,
X = μ + Zσ
where Z is Ravi's score on the test
Replacing the values, we get,
X = 150 + (1.50*20)
= 150 + 30
= 180
180 is the required answer.
Answered by
0
Answer:
30
Step-by-step explanation:
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