A United Nations report shows the mean family income for Mexican migrants to the United States is $31,140 per year. A FLOC (Farm Labor Organizing Committee) evaluation of 25 Mexican family units reveals a mean to be $38,690 with a sample standard deviation of $12,240.

a. State the null hypothesis and the alternate hypothesis.

b. State the decision rule for 0.01 significance level. (Negative amounts should be indicated by a minus sign. Round your answers to 3 decimal places.)

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

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