Unformatted text preview: less than, or not equal to the population proportion (or population mean) of the second population. Consider the claim from question 1 above: “Graduating students at our college have a mean GPA that is higher than 2.50.” The null hypothesis is: Ho: The mean GPA for graduating students at our college is equal to 2.50. We will use the assumption that the mean is 2.50 as the basis for testing the claim. The alternative hypothesis is: © 2011 THE CARNEGIE FOUNDATION FOR THE ADVANCEMENT OF TEACHING A PATHWAY THROUGH STATISTICS, VERSION 1.6, STATWAY™
STUDENT HANDOUT STATWAY INSTRUCTOR NOTES  5 Lesson 8.2.1 Testing a Hypothesis Ha: The mean GPA for graduating students at our college is greater than 2.50. Since we believe the population mean is greater than 2.5, this is the claim we are trying to prove. We examine the data to see if they support this claim. TRY THESE 5 Determine the null and alternative hypotheses for the claim from question 2: “More than half of all students at our college plan to vote in 2012.” Ho: Ha: 6 Determine the null and alternative hypotheses for the claim from question 3: “Americans who are overweight and physically active have lower risk of heart attack than those who are normal weight but inactive.” Ho: Ha: 7 Determine the null and alternative hypotheses for the claim from question 4: “The average body mass index (BMI) for American teenagers and Australian teenagers is different.” Ho: Ha: © 2011 THE CARNEGIE FOUNDATION FOR THE ADVANCEMENT OF TEACHING A PATHWAY THROUGH STATISTICS, VERSION 1.6, STATWAY™
STUDENT HANDOUT STATWAY INSTRUCTOR NOTES  6 Lesson 8.2.1 Testing a Hypothesis TAKE I...
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 Spring '14

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