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Author Question: What is the probability that X is farther than one standard deviation from the mean? What will be ... (Read 51 times)

rl

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on: Jun 24, 2018
What is the probability that X is farther than one standard deviation from the mean?
 
  What will be an ideal response?

Question 2

In the sign test applications, the normal approximation to the binomial distribution may be used whenever the number of nonzero differences exceeds:
 
  A) 5
  B) 10
  C) 20
  D) 15


kalskdjl1212

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

   = 1  6.333 , or -5.633 to 7.633, so X would have to take on the values -5, 0, or 5 to be in this interval, and the probability of this occurring is 0.3 + 0.1 + 0.3 = 0.7. The probability that X is outside this interval is 1 - 0.7 = 0.3

Answer to Question 2

C


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