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4. A study of the effect of television commercials on 12-year-old children measured their attention span,...

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Statistics

4. A study of the effect of television commercials on12-year-old children measured their attention span, in seconds. Thecommercials were for clothes, food, and toys.

ClothesFoodToys
354256
323942
343953
355560
284763
314253
173448
314358
205747
4751
4451
54

  Click here for the Excel Data File

  1. Complete the ANOVA table. Use 0.05 significance level.(Round the SS and MS values to 1 decimal place andF value to 2 decimal places. Leave no cells blank — becertain to enter \"0\" wherever required. Round the df values tonearest whole number.)
  2. Find the values of mean and standard deviation. (Roundthe mean and standard deviation values to 3 decimalplaces.)
  3. Is there a difference in the mean attention span of thechildren for the various commercials?
  4. Are there significant differences between pairs of means?
ItemLength
Clothes35
Clothes32
Clothes34
Clothes35
Clothes28
Clothes31
Clothes17
Clothes31
Clothes20
Food42
Food39
Food39
Food55
Food47
Food42
Food34
Food43
Food57
Food47
Food44
Food54
Toys56
Toys42
Toys53
Toys60
Toys63
Toys53
Toys48
Toys58
Toys47
Toys51
Toys51

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