Homework SourseA study of the effect of television commercials on 12yearold
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.
Complete the ANOVA table. Use .05 significance level. (Round the SS and MS values to 1 decimal place and F value to 2 decimal places. Leave no cells blank - be certain to enter \"0\" wherever required.)
Find the values of mean and standard deviation. (Round the mean and standard deviation values to 3 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. |
Solution
(1)
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(2)
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(3)The hypothesis of identical means can definitely be rejected
There is differencein the mean attention span.
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(4) Clothes have a mean attention span of at least ten minutes below the other groups.
| ANOVA table | |||||
| Source | SS | df | MS | F | p-value |
| Treatment | 3,182.04 | 2 | 1,591.019 | 35.56 | 1.57E-08 |
| Error | 1,297.46 | 29 | 44.740 | ||
| Total | 4,479.50 | 31 |
