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Question:I can not understand normal curve areas, please help and explain how to calculate.

 

A random sample of n=49 observations is drawn from a population with a mean equal to 35 and a standard deviation equal to 14.

 

a. Find the probability that x is less than 29

 

b. Find the probability that x is greater than 40

 

c. Find the probability that x falls between 29 and 37

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