Question

Suppose X∼N(2,25). What is Prob(X>14.5) ? 0.0062 0.0060 0.0078 0.0018 0.9982

Answer 1

(a) 0.0062

Explanation:

You want the probability P(X > 14.5) given that X has a normal distribution with mean 2 and variance 25.

P(X > 14.5)

This probability can be found using a suitable calculator or spreadsheet. The calculator in the attachment specifies the normal distribution using mean and standard deviation, so we need to find the square root of the variance.

P(X > 14.4) ≈ 0.0062

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