Question: Please help. I keep getting these wrong. The Dean of ASBE School of Business is concerned that grades in the MBA program are distributed appropriately.

Please help. I keep getting these wrong.

The Dean of ASBE School of Business is concerned that grades in the MBA program are distributed appropriately. Too many high grades or too many low grades would pose a problem. We wish to test the claim that the mean GPA of ASBE students is significantly different than 3.5 at the 0.01 significance level. The null and alternative hypothesis would be:

  • H0:p=3.54 Ha:p3.54
  • H0:p=3.54 Ha:p<3.54
  • H0:=3.5 Ha:3.5
  • H0:=3.5 Ha:<3.5
  • H0:=3.5 Ha:>3.5
  • H0:p=3.54 Ha:p>3.54

Is this test:

left-tailed two-tailed right-tailed Based on a sample of 30 student grades, the sample mean GPA was 3.48 with a standard deviation of 0.03 The test statistic is (Rounded to 3 decimals): Does this test:

  • Fail to reject the null hypothesis
  • Reject the null hypothesis

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