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- September 13, 2020
- By menge

A random variable, X, has a normal distribution with a mean of 50 and unknown standard deviation. The probability that X exceeds 70 is 0.12. Find the probability that X lies between 30 and 70.You can solve this problem with or without a Standard Normal Table

A)

0.88

B)

0.06

C)

0.44

D)

0.95

E)

0.76

Given:

Question:

A random variable, X, has a normal distribution with a mean of 50 and unknown standard deviation. The

probability that X exceeds 70 is 0.12. Find the probability that X lies…