snuggsjonathanp20gvh snuggsjonathanp20gvh

04-01-2018
Mathematics

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A normal distribution of data has a mean of 90 and a standard deviation of 18. What’s the approximate z score for the value of 64

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anchitthawi anchitthawi

17-01-2018

[tex]z = \frac{x - u}{sd} [/tex]
when x is value (64)
u is mean (90)
and sd is satandard deviation (18)

so z = 64 - 90 / 18
z = -26 / 18 = -1.44

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mattkb00 mattkb00

11-12-2018

Answer:

It is -1.4! just took test

Step-by-step explanation:

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