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Author Question: Which of the following statements concerning areas under the standard normal curve is/are true? ... (Read 33 times)

nenivikky

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on: Jul 25, 2018
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


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lkoler

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Reply #1 on: Jul 25, 2018
Answer to Question 1

D

Answer to Question 2

C


nenivikky

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Reply 2 on: Jul 25, 2018
Wow, this really help

Mochi

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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