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If X is a normal random variable with mean of 2245 and a standard deviation of 240, what is the number of standard deviations from

If X is a normal random variable with mean of 2245 and a standard deviation of 240, what is the number of standard deviations from 1705 to 2245?

a.

1.25

b.

None of the suggested answers are correct

c.

2.25

d.

4.50

e.

-1.125

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Cambridge International AS & A Level Mathematics Probability & Statistics 1 Coursebook

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