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Author Question: Find the z-score for the value 83, when the mean is 52 and the standard deviation is 6. A) z = ... (Read 77 times)

maychende

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on: Jul 24, 2018
Find the z-score for the value 83, when the mean is 52 and the standard deviation is 6.
 
  A) z = 1.48 B) z = 5.00 C) z = 5.17 D) z = -1.48

Question 2

Three fair coins are tossed and either heads or tails is observed for each coin. Events A and B are defined as follows.
 
  A: Three heads are observed.
  B: Exactly two heads are observed.
 
  Is P(A  B) equal to the sum of P(A ) and P(B)? Explain.


ASDFGJLO

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

C

Answer to Question 2

Yes, P(A  B) is equal to the sum of P(A ) and P(B) because events A and B are mutually exclusive.


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