# week8 - 1 A United Nations report shows the mean family...

This preview shows pages 1–4. Sign up to view the full content.

1. A United Nations report shows the mean family income for Mexican migrants to the United States is \$27,150 per year. A FLOC (Farm Labor Organizing Committee) evaluation of 30 Mexican family units reveals a mean to be \$29,500 with a sample standard deviation of \$11,150. Does this information disagree with the United Nations report? Apply the 0.01 significance level. (a ) State the null hypothesis and the alternate hypothesis. H 0 : μ = H 1 : μ (b ) State the decision rule for .01 significance level. (Round your answers to 3 decimal places.) Reject H 0 if t is not between and (c) Compute the value of the test statistic. (Round your answer to 2 decimal places.) Value of the test statistic (d ) Does this information disagree with the United Nations report? Apply the 0.01 significance level. Do not reject Ho. This data does not contradict the report. Explanation: (c) 2. After a losing season there is a great uproar to fire the head football coach. In a random sample of 250 college alumni, 90 favor keeping the coach. Test at the .02 level of significance whether the proportion of alumni who support the coach is less than 50 percent. (a ) State the null hypothesis and the alternate hypothesis. (Round your answers to 2 decimal places.)

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
H 0 : π H 1 : π < (b ) State the decision rule for .02 significance level. (Round your answers to 2 decimal places.) Reject H 0 if z is < (c) Compute the value of the test statistic. (Round your answers to 3 decimal places.) Value of the test statistic (d ) Test at the .02 level of significance whether the proportion of alumni who support the coach is less than 50 percent. Reject H 0 . There is sufficient evidence to conclude the population proportion of alumni supporting the coach is less than.50. Explanation: (c) 3. The following hypotheses are given. H 0 : π ≤ 0.73 H 1 : π > 0.73 A sample of 120 observations revealed that p =0.88. At the 0.1 significance level, can the null hypothesis be rejected? (a ) State the decision rule. (Round your answer to 2 decimal places.) Reject H 0 and accept H 1 if z > (b) Compute the value of the test statistic. (Round your answer to 2 decimal places.) Value of the test statistic (c) Reject H 0 .
Explanation: b. 3.7 is found by, 4.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 12

week8 - 1 A United Nations report shows the mean family...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online