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Author Question: Henry's first history exam score is +1 standard deviation from the mean in a normal distribution. ... (Read 50 times)

kamilo84

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on: Jun 20, 2018
Henry's first history exam score is +1 standard deviation from the mean in a normal distribution. The test has a mean of 65 and a standard deviation of 5 . Henry's percentile rank would be approximately:
 
  a. 84.
  b. 55.
  c. 70.
  d. none of the above.

Question 2

Sue's first psychology exam score is 2 standard deviations from the mean in a normal distribution. The test has a mean of 75 and a standard deviation of 5 . Sue's percentile rank would be approximately:
 
  a. 16.
  b. 2.5.
  c. 65.
  d. none of the above.


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sultana.d

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Reply #1 on: Jun 20, 2018
Answer to Question 1

a

Answer to Question 2

b


kamilo84

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Reply 2 on: Jun 20, 2018
Thanks for the timely response, appreciate it

ttt030911

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Reply 3 on: Yesterday
Wow, this really help

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