Mathematics, 28.11.2019 07:31 china2221
Suppose that the length, in inches, of a witch's or wizard's wand is a normal random variable with parameters mu = 11 and sigma^2 = 2. (a) what percentage of wands are over 12 inches? leave you answer in terms of phi. (b) given that a wand is greater than 12 inches, what is the probability it is greater than or equal to 15 inches? leave you answer in terms of phi.
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