In marketing children’s products, it is extremely important to produce television commercials that hold the attention of the children who view them. A psychologist hired by a marketing research firm wants to determine whether differences in attention span exist among advertisements for different types of products. A number of children under 10 years of age are asked to watch one 60-second commercial for one of three types of products, and their attention spans are measured in seconds. The results are shown in the accompanying table: Type of Product Advertised Toys/Games Food/Candy Children’s Clothing 42 55 30 45 58 35 48 52 42 40 60 32 50 57 38 a). At 5% level of significance, is there sufficient evidence to conclude that there are differences in the actual average attention span among the three types of product advertised? Show all necessary work.
In marketing children’s products, it is extremely important to produce television commercials that hold the attention of the children who view them. A psychologist hired by a marketing research firm wants to determine whether differences in attention span exist among advertisements for different types of products. A number of children under 10 years of age are asked to watch one 60-second commercial for one of three types of products, and their attention spans are measured in seconds. The results are shown in the accompanying table:
Type of Product Advertised
|
Toys/Games |
Food/Candy |
Children’s Clothing |
|
42 |
55 |
30 |
|
45 |
58 |
35 |
|
48 |
52 |
42 |
|
40 |
60 |
32 |
|
50 |
57 |
38 |
a). At 5% level of significance, is there sufficient evidence to conclude that there are differences in the actual average attention span among the three types of product advertised? Show all necessary work.
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