Normal Distribution, statistics homework help

THE NEXT TWO QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:

Let the random variable X follow a normal distribution with a mean of 17.1 and a

standard deviation of 3.2.

11. What is P(X > 16)?

A) 0.3401

B) 0.6331

C) 0.3669

D) 0.8326

12. What is P(15 < X < 20)?

A) 0.5581

B) 0.1814

C) 0.5640

D) 0.2546

wouldn’t the formula for this problem be: z=x-mean/sigma for #1?

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Normal Distribution, statistics homework help

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