MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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A study of the effect of television commercials on 12-year-old children measured their attention span, in seconds. The commercials were for clothes, food, and toys.
| Clothes | Food | Toys |
|---|---|---|
| 43 | 30 | 52 |
| 24 | 38 | 58 |
| 42 | 46 | 43 |
| 35 | 54 | 49 |
| 28 | 47 | 63 |
| 31 | 42 | 53 |
| 17 | 34 | 48 |
| 31 | 43 | 58 |
| 20 | 57 | 47 |
| 47 | 51 | |
| 44 | 51 | |
| 54 |
Click here for the Excel Data File
a. What are the null and alternate hypotheses?
b. Complete the ANOVA table. Use 0.05 significance level. (Round the SS and MS values to 1 decimal place, F value, and p-value to 2 decimal places, F crit to 4 decimal places. Leave no cells blank — be certain to enter "0" wherever required.)
c. What is the test statistic? (Round your answer to 4 decimal places.)
d. What is the p-value? (Round your answer to 4 decimal places.)
e. What is your decision regarding the null hypothesis?
f. Interpret the result.
g. Compute the 95% confidence
h. Which pairs of means are statistically different?
multiple choice
-
Clothes – Food
-
Clothes – Toys
-
Food – Toys
-
All of the above.
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