Question: On reconsidering the experiment in Exercise 14 105 the psychologist decides

On reconsidering the experiment in Exercise 14.105, the psychologist decides that the age of the child may influence the attention span.
Consequently, the experiment is redone in the following way. Three 10-year-olds, three 9-year-olds, three 8-year-olds, three 7-year-olds, three 6-year-olds, three 5-year-olds, and three 4-year-olds are randomly assigned to watch one of the commercials, and their attention spans are measured. Do the results indicate that there are differences in the abilities of the products advertised to hold children’s attention?

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