Do people feel hungrier after sampling a healthy snack? Researchers randomly assign volunteers into one of three groups. The people in the first group were asked to taste a snack that was billed as a new health bar containing high levels of protein, vitamins, and fiber. The people in the second group were asked to taste the same snack but there told it was a tasty chocolate bar with a raspberry center. After tasting the snack, participants were asked to rate their hunger on a scale from 1 (not at all hungy) to 7 (very hungry). The people in the third group were asked to rate their hunger but were not given a snack. Healthy Tasty No Snack 8 3 3 7 1 3 7 3 5 4 2 6 5 6 5 a. Perform a complete one-way ANOVA hypothesis test. Test at the .05 level of significance. b. Do you need to perform post hocs? Explain but do not compute the post hocs. c. Compute eta squared.
Do people feel hungrier after sampling a healthy snack? Researchers randomly assign volunteers into one of three groups. The people in the first group were asked to taste a snack that was billed as a new health bar containing high levels of protein, vitamins, and fiber. The people in the second group were asked to taste the same snack but there told it was a tasty chocolate bar with a raspberry center. After tasting the snack, participants were asked to rate their hunger on a scale from 1 (not at all hungy) to 7 (very hungry). The people in the third group were asked to rate their hunger but were not given a snack.
|
Healthy |
Tasty |
No Snack |
|
8 |
3 |
3 |
|
7 |
1 |
3 |
|
7 |
3 |
5 |
|
4 |
2 |
6 |
|
5 |
6 |
5 |
a. Perform a complete one-way ANOVA hypothesis test. Test at the .05 level of significance.
b. Do you need to perform post hocs? Explain but do not compute the post hocs.
c. Compute eta squared.
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