Problem 10.72
An Article in American Demographics investigated consumer habits at the mall. We tend to spend the most money when shopping on weekends, particularly on Sundays between 4:00 and 6:00 P.M. Wednesday-morning shoppers spend the least.15 Independent random samples of weekend and weekday shoppers were selected and the amount spent per trip to the mall was recorded as shown in the following table: Weekends Weekdays n1 = 20 n2 = 20 y1 = $78 y2 = $67 s1 = $22 s2 = $20 a Is there sufficient evidence to claim that there is a difference in the average amount spent per trip on weekends and weekdays? Use = .05. b What is the attained significance level?

Step-by-Step Solution:
Step 1 of 3
QuadraticRelationship - Check the residual plot to determine of the form of model is appropriate QuadraticModel QuadraticModel(2) QuadraticModel NoteExample ConcaveUpward - As price increase the sales volume decrease at a decreasing rate b0= 539242.8 b1= -765344.8 b2= 290156.24 Interpretations b = 539242.8 0 We predicted the sales volume to be 539242.8 when the price of cat food is 0. - This is extrapolation b1= -765344.8 We have no potential interpretation - What if we increase x1 by 1 unit b 2 290156.24 Since b2 is positive, we have a positive concave upward relationship between price and volume of cat food. HypothesisTesting H 0β 20 vs H :a >2 t-test T = 20.23 p-value =

The answer to “An Article in American Demographics investigated consumer habits at the mall. We tend to spend the most money when shopping on weekends, particularly on Sundays between 4:00 and 6:00 P.M. Wednesday-morning shoppers spend the least.15 Independent random samples of weekend and weekday shoppers were selected and the amount spent per trip to the mall was recorded as shown in the following table: Weekends Weekdays n1 = 20 n2 = 20 y1 = $78 y2 = $67 s1 = $22 s2 = $20 a Is there sufficient evidence to claim that there is a difference in the average amount spent per trip on weekends and weekdays? Use = .05. b What is the attained significance level?” is broken down into a number of easy to follow steps, and 115 words. This full solution covers the following key subjects: . This expansive textbook survival guide covers 32 chapters, and 3350 solutions. Since the solution to 10.72 from 10 chapter was answered, more than 234 students have viewed the full step-by-step answer. This textbook survival guide was created for the textbook: Mathematical Statistics with Applications , edition: 7. Mathematical Statistics with Applications was written by and is associated to the ISBN: 9780495110811. The full step-by-step solution to problem: 10.72 from chapter: 10 was answered by , our top Statistics solution expert on 07/18/17, 08:07AM.