A pharmaceutical testing company wants to test a new cholesterol drug. The average cholesterol of the target population is 200 mg and they have a standard deviation of 25 mg.
The company wished to test a sample of
people who fall between 1.5 and 3 z-scores above the mean. Into what range must a candidates cholesterol
level be in order for the candidate to be included in the study?
A) 237.5 - 275 B) 225 - 237.5 C) 125 - 162.5 D) 162.5 - 275
Question 2
Compare a graph of the normal density function with mean of 0 and standard deviation of 1 with a graph of a normal density function with mean equal to 0 and standard deviation of 0.5. The graphs would
A) Have no horizontal displacement but one would be steeper that the other.
B) Have no horizontal displacement but one would be flatter than the other.
C) Have the same height but one would be shifted 4 units to the right.
D) Have the same height but one would be shifter 4 units to the left.
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