A meta-analysis of previous studies examining children’s materialistic attitudes suggests that American children overall have a mean score of 70 on the scale.

a. Conduct a hypothesis test at the .01 alpha-level to assess whether children from the state that has banned children’s advertising have the same mean score for materialistic attitudes as the nationwide mean.

b. Draw a t-distribution. Label the decision and sample t values on the x axis.

Shade the appropriate area on the curve and label it.

c. Why is the sample t a negative value? Why is the decision t a negative value?

d. What would you conclude about the success of the elimination of advertising to children at reducing their materialistic values? Consider the statistical and practical significance of the result in your response.

e. In this example, which type of error—Type I or Type II—could we have made? Explain how you know and what the error would mean. Assess the consequences of making that particular error.