Question

In an effort to make children’s toys safer and more tamperproof, toy packaging has become cumbersome for parents to remove in many cases. Accordingly, the director of marketing at Toys4Tots, a large toy manufacturer, wants to evaluate the effectiveness of a new packaging design that engineers claim will reduce customer complaints by more than 10 percentage points. Customer satisfaction surveys were sent to 230 parents who registered toys packaged under the old design and 230 parents who registered toys packaged under the new design. Of these, 81 parents expressed dissatisfaction with packaging of the old design, and 42 parents expressed dissatisfaction with packaging of the new design.

Let p₁ represent the population proportion of parents that expressed dissatisfaction with the packaging of the old design and p₂represent the population proportion of parents that expressed dissatisfaction with the packaging of the new design.

1.What is the test statistic?

Answer 1

쇠 Test statistic 230 230 2 0.1326 use the llaing amula o test Statis br ni

Wheat, の30 ±230 = Co. 3521-0.1826)-0 2 130 , 230