Question

A training program is being tested to see if the employee service scores improve. The claim...

A training program is being tested to see if the employee service scores improve. The claim is The training failed. The scores are lower after training.

Use alph=0.01alph=0.01  Use the claim for the alternate hypothesis.

Before the training 9.4 94 66.1 42.2 117.8 105.5
After the training 2.4 85.7 57.5 33.1 117.3 102.3


Find the differences. Subtract the before row from the after.


Choose the null and alternate hypothesis.

  • H0:μH0:μd = 0
    H1:μH1:μd >0>0
  • H0:μH0:μd = 0
    H1:μH1:μd <0<0
  • H0:μH0:μd = 0
    H1:μH1:μd ≠0≠0


The drawing is

  • two-tailed
  • right-tailed
  • left-tailed

What is the mean for the differences?
What is the standard deviation for the differences?
What is the test statistic?   
What is the degrees of freedom? Paired is number of pairs minus 1

What is the critical value t star?

Do you reject or fail to reject?

  • Fail to reject the null hypothesis
  • Reject the null hypothesis
Math   Statistics-And-Probability   
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