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Author Question: Grades for a statistics exam for a certain class follow the normal probability distribution with a ... (Read 77 times)

Sportsfan2111

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on: Jun 24, 2018
Grades for a statistics exam for a certain class follow the normal probability distribution with a mean of 82 and a standard deviation of 12 . What percentage of the students in the class earned a B grade (80-89)?

Question 2

True or False If we want to cut the maximum likely error in half, we will have to double the sample size.
  Indicate whether the statement is true or false


deja

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

0.2865

Answer to Question 2

F


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