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Author Question: What is the test statistic for this test? A) Z = 2.04 B) t = 1.79 C) t = 2.04 D) Z = ... (Read 25 times)

Redwolflake15

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on: Jun 24, 2018
What is the test statistic for this test?
 
  A) Z = 2.04
  B) t = 1.79
  C) t = 2.04
  D) Z = 1.79

Question 2

Find the 95th percentile.
 
  What will be an ideal response?


Shshxj

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

C

Answer to Question 2

Find x0 such that P(X  x0 ) = 0.95 = P(Z  z0 ).
Since the area to the left of z0 is greater than .5, z0 must be larger than zero such that P(0 < Z < z0 ) = 0.45, so z0 = 1.645. Thus, x0 = 75 + (1.645 )(4 ) = 81.58


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