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Author Question: A professor at a local university noted that the exam grades of her students were normally ... (Read 142 times)

sdfghj

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on: Jun 24, 2018
A professor at a local university noted that the exam grades of her students were normally distributed with a mean of 73 and a standard deviation of 11 . If 69.5 percent of the students received grades of C or better, what is the minimum score of those who received C's?
 a. 70.39
   b. 67.39
   c. 50.39
   d. 65.39

Question 2

The interval estimate of the mean value of y for a given value of x is the
 a. prediction interval estimate.
  b. confidence interval estimate.
  c. average regression interval.
  d. x versus y correlation interval.


bd5255

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Reply #1 on: Jun 24, 2018
Answer to Question 1

b

Answer to Question 2

b


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sdfghj

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Reply #2 on: Jun 24, 2018
Thank you :)


bd5255

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Reply #3 on: Jun 24, 2018
Happy to help you


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