Mathematics, 16.10.2020 07:01 weeblordd
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 220 parents who registered toys packaged under the old design and 220 parents who registered toys packaged under the new design. Of these, 86 parents expressed dissatisfaction with packaging of the old design, and 41 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 p2 represent the population proportion of parents that expressed dissatisfaction with the packaging of the new design.
A. Specify the null and alternative hypotheses to test for whether the proportion of customer complaints has decreased by more than 5% under the new packaging design.
1. H0 : p1 - p2 < 0.10; HA : p1 - p2 > 0.10
2. H0 : p1 - p2 = 0.10; HA : p1 - p2 is not equal to 0.10
3. H0 : p1 - p2 > 0.10; HA : p1 - p2 < 0.10
B. What is the value of the test statistic and the associated p-value?
C. At the 1% significance level, do the results support the engineers' claim?
D. At the 10% significance level, do the results support the engineers' claim?
Answers: 1
Mathematics, 21.06.2019 17:40
Afamily of five rents a kayak and splits the total time, k, equally. each family member spent less than 25 minutes kayaking. which values can be used to complete the math sentence below so that it accurately represents the situation? intro done
Answers: 2
Mathematics, 21.06.2019 20:00
The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?
Answers: 1
Mathematics, 22.06.2019 02:00
Aiko jumped rope for 20 min and stopped at 8: 05 when did she start
Answers: 1
In an effort to make children’s toys safer and more tamperproof, toy packaging has become cumbersome...
History, 20.07.2019 18:00
Biology, 20.07.2019 18:00
Chemistry, 20.07.2019 18:10
Chemistry, 20.07.2019 18:10
Social Studies, 20.07.2019 18:10
Social Studies, 20.07.2019 18:10
Business, 20.07.2019 18:10
Physics, 20.07.2019 18:10
Biology, 20.07.2019 18:10
History, 20.07.2019 18:10
Mathematics, 20.07.2019 18:10