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Chapter 9: Q.8 (page 598)
In a test of against , a random sample of size yields a test statistic of . The P-value of the test is approximately equal to
(a) .
(b) .
(c) .
(d) .
(e) .
The correct answer is (d) 0.20.
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A change is made that should improve student satisfaction with the parking situation at your school. Right now, 37% of students approve of the parking that鈥檚 provided. The null hypothesis is tested against the alternative.
Anemia Hemoglobin is a protein in red blood cells that carries oxygen from the lungs to body tissues. People with fewer than grams of hemoglobin per deciliter of blood are anemic. A public health official in Jordan suspects that Jordanian children are at risk of anemia. He measures a random sample of children. Check the conditions for carrying out a significance test of the official鈥檚 suspicion.
Tests and CIs The P-value for a one-sided test of the null hypothesisis .
(a) Does the confidence interval for include ? Why or why not?
(b) Does the confidence interval for include ? Why or why not?
What is significance good for? Which of the following questions does a significance test answer? Justify your answer.
(a) Is the sample or experiment properly designed?
(b) Is the observed effect due to chance?
(c) Is the observed effect important?
Refer to Exercise 79. Construct and interpret a confidence interval for the population mean M. What additional information does the confidence interval provide .
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