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 34 38 64 30 34 50 44 51 39 35 42 48 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, p-value, and F crit to 2 decimal places. Leave no cells blank — be certain to enter "0" wherever required. Round the df values to nearest whole number.) c. What is the test statistic? (Round your answer to 4 decimal places.)
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 |
| 34 | 38 | 64 |
| 30 | 34 | 50 |
| 44 | 51 | 39 |
| 35 | 42 | 48 |
| 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, p-value, and F crit to 2 decimal places. Leave no cells blank — be certain to enter "0" wherever required. Round the df values to nearest whole number.)
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
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Clothes – Food
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Clothes – Toys
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Food – Toys
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All of the above.
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