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the mathematics section of the act test has mean of 20 9 and a standard division of 5 3 for years 2013 to 2015 what is the

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The mathematics section of the act test has mean of 20.9 and a standard division of 5.3 for years 2013 to 2015. What is the Ross score of a test with a Z score of -1.50 give answer to two decimal places

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Answer to a math question The mathematics section of the act test has mean of 20.9 and a standard division of 5.3 for years 2013 to 2015. What is the Ross score of a test with a Z score of -1.50 give answer to two decimal places

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4.5

103 Answers

\mu = 20.9

\sigma = 5.3

Z = -1.50

X = \mu + Z \cdot \sigma

X = 20.9 + (-1.50) \cdot 5.3

X = 20.9 - 1.50 \cdot 5.3

X = 20.9 - 7.95

X = 12.95

So the raw score is:

X = 12.95

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