A 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.

(1) Complete the ANOVA table. Use 0.05 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.) Source SS DF MS F P Factors Error Total

(2) Find the values of mean and standard deviation. (Round the mean and standard deviation values to 2 decimal places.) Level N Mean StDev Clothes Food Toys

(3) Is there a difference in the mean attention span of the children for the various commercials? The hypothesis of identical means can definitely be . There is in the mean attention span.

(4) Are there significant differences between pairs of means? Clothes have a mean attention span of at least ten minutes the other groups.

Clothes	Food	Toys
32	48	52
26	24	55
37	33	38
35	58	59
28	47	63
31	42	53
17	34	48
31	43	58
20	57	47
	47	51
	44	51
	54

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 t

A study of the effect of television commercials on 12yearold

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