Conduct a test of a hypothesis about a population mean

8/22/2016 Check Your Work

http://ezto.mheducation.com/hm.tpx 1/1

 4. value:10.00 points  

This window shows what is correct and incorrect for the work you have completed so far. Even if all of the work you have done so far is correct, you may not have completed everything.

A United Nations report shows the mean family income for Mexican migrants to the United States is $28,120 per year. A FLOC (Farm Labor Organizing Committee) evaluation of 27 Mexican family units reveals a mean to be $39,750 with a sample standard deviation of $12,765. Does this information disagree with the United Nations report? Apply the 0.01 significance level.

a. State the null hypothesis and the alternate hypothesis.

   

  H0: μ = 28,120  

  

  H1: μ ≠ 28,120  

  

b. State the decision rule for .01 significance level. (Negative amounts should be indicated by a minus sign. Round your answers to 3 decimal places.)

  Reject H0 if t is not between  17355    and  40855  

c. Compute the value of the test statistic. (Round your answer to 2 decimal places.)

  Value of the test statistic 24.60    

d. Does this information disagree with the United Nations report? Apply the 0.01 significance level.

   Reject Ho   . This data  contradicts    the report.

 

©2016 McGraw­Hill Education. All rights reserved.