statistics

[jonabiday]

. If an adult male cholesterol is a normal distribution with a mean of 198 and a standard deviation of 27, what is the chance that a randomly chosen male would have a cholesterol level

a. between 169 and 200?
B.Less than 150
c. greater than 200

 

[Deleted member 4993]

. If an adult male cholesterol is a normal distribution with a mean of 198 and a standard deviation of 27, what is the chance that a randomly chosen male would have a cholesterol level

a. between 169 and 200?
B.Less than 150
c. greater than 200

Do you know about z-distribution and z-transformation?

Please show us what you have tried and exactly where you are stuck.

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Please share your work/thoughts about this problem.

 

[HallsofIvy]

This is simply a matter of looking up the answer in a table or on a graph. If there is a mean of 198 and standard deviation 27, the "standard normal variable" is z= (x- 198)/27.

So to find "the chance that a randomly chosen male would have a cholesterol level
a. between 169 and 200?
B.Less than 150
C. greater than 200"

Calculate z= (150- 198)/27, z= (169- 198)/27, z= (200- 198)/27 and look up the probabilities of those z values.