Which of the following statements concerning areas under the ...

[nenivikky]

Which of the following statements concerning areas under the standard normal curve is/are true?
 
  a. If a z-score is negative, the area to its right is greater than 0.5
  b. If the area to the right of a z-score is less than 0.5, the z-score is negative.
  c. If a z-score is positive, the area to its left is less than 0.5
  A) a, b B) b, c C) a, c D) a

Question 2

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 candidate's cholesterol level be in order for the candidate to be included in the study?
  A) 162.5 - 275 B) 225 - 237.5 C) 237.5 - 275 D) 125 - 162.5

[lkoler]

Answer to Question 1

D

Answer to Question 2

C

[nenivikky]

Excellent

[cdmart10]

Thanks for the timely response, appreciate it