Create an example probability distribution in which the expected value is 15

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Create an example probability distribution in which the expected value is 15. You must have at least three different values for x.

What are considered unusual z-score values?

What are the values for the mean and standard deviation of a standard normal distribution? 

The serum cholesterol levels in milligrams/deciliter (mg/dL) in a certain Mediterranean population are found to be normally distributed with a mean of 160 and a standard deviation of 50. Answer the following: 

(d) The top 3% of all people in this group have cholesterol levels that make them "at-risk" for heart problems. Determine

(a) Determine the z-score for a person from this population that has a cholesterol level of 115. Then find the z-score for

someone whose cholesterol level is 242. 

(b) If x represents a possible cholesterol level from this population, find P(x > 145). 

(c) Find P(100 < x < 200) and give an interpretation of this value. 

the raw-score cholesterol level which separates the at-risk people from the rest of the group.

Does a confidence interval for µ get wider or narrower if: 
(a) the percent of desired confidence (confidence level) decreases from 99% to 90%? 
(b) the size of the sample used to produce the confidence interval is decreased? 
(c) our estimate of the standard deviation gets smaller?

    • 8 years ago
    Create an example probability distribution in which the expected value is 15
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