When people make estimates, they are influenced by anchors to their estimates. A study was conducted in which were asked to estimate the number of calories in a cheeseburger. One group was asked to do this after thinking about a calorie-laden cheesecake. A second group was asked to do this after thinking about an organic fruit salad. The
Suppose that the study was based on a sample of 20 people who thought about the cheesecake first and 20 people who thought about the organic fruit salad first, and the standard deviation of the number of calories in the cheeseburger was 128 for the people who thought about the cheesecake first and 140 for the people who thought about the organic fruit salad first.
a. State the null and alternative hypotheses if you want to determine whether the mean estimated number of calories in the cheese-burger is lower for the people who thought about the cheesecake first than for people who thought about the organic fruit salad first.
b. In the context of this study, what is the meaning of the Type I or error?
c. In the context of this study, what is the meaning of the Type II error?
d. At the 0.01 level of significance, is there evidence that the mean estimated number of calories in the cheeseburger is lower for the people who thought about the cheesecake first than for the people who thought about the organic fruit salad first?
e. If you were developing a commercial for a cheeseburger, based on the results of (d), what other foods might you show in the commercial?
Want to see the full answer?
Check out a sample textbook solutionChapter 10 Solutions
BASIC BUSINESS STAT LL W/MYLAB
- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw HillBig Ideas Math A Bridge To Success Algebra 1: Stu...AlgebraISBN:9781680331141Author:HOUGHTON MIFFLIN HARCOURTPublisher:Houghton Mifflin HarcourtHolt Mcdougal Larson Pre-algebra: Student Edition...AlgebraISBN:9780547587776Author:HOLT MCDOUGALPublisher:HOLT MCDOUGAL