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1. A gambler suspects that a die is loaded. She rolls the die 60 times and gets the following results.
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Face |
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Count |
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2. A study was conducted to see if a student's year in school had any effect on how well they did in their classes. The following data for all the students in all their classes was obtained from the Registrar.
|
|
A |
B |
C |
D |
F |
|
Fresh |
1569 |
1567 |
1214 |
432 |
987 |
|
Soph |
1484 |
1581 |
1322 |
212 |
643 |
|
Jun |
1592 |
1609 |
1472 |
153 |
421 |
|
Sen |
1685 |
1623 |
1211 |
75 |
315 |
Use a chi-square test to determine if there is a significant difference between the grades received by students in different classes.
3. An Environmental Studies class did a survey to determine the relation between engine size and fuel consumption. They obtained the following data for five types of cars.
|
Car |
Size |
MPG |
|
A |
1.6 |
38 |
|
B |
1.8 |
29 |
|
C |
2.2 |
32 |
|
D |
3.2 |
24 |
|
E |
4.7 |
17 |
where the engine size is given in liters and the mileage is given in miles per gallon. The question is whether engine size has an effect on gasoline mileage.