The owner of a food store was concerned about her sales of a yogurt. To help boost sales, she decided to place the product on a different shelf. She kept track of sales (number of containers sold per week) for six months after she made the change. The values are in a stem-and-leaf display, along with the sales numbers for the six months prior to making the change. Do these results suggest that sales are better after the change? Test an appropriate hypothesis and state your conclusion. Be sure to check assumptions and conditions. Assume α=0.05. Click the icon to view the stem-and-leaf displays. Are the assumptions satisfied? OA. Yes, the assumptions are satisfied because the data values are independent and the data are appropriately paired. OB. Yes, the assumptions are satisfied because the data are approximately normal. OC. No, the assumptions are not satisfied because the data are approximately normal. D. No, the assumptions are not satisfied because the data are not a random sample, but they may be representative and sufficient to answer the owner's question. E. Yes, the assumptions are satisfied because the experiment was randomized, so it can be assumed that the data values are independent and the two groups are independent. What are the hypotheses for this test? OA. Ho: One distribution is shifted in location higher or lower than the other HA: The two samples are from the same distribution B. Ho: The two samples are from the same distribution HA: The after distribution is higher than the before distribution O C. Ho: The after distribution is lower than the before distribution HA: The two samples are from the same distribution O D. Ho: The two samples are from the same distribution HA: The two samples are not from the same distribution G Find the test statistic. (If there is no smaller group, use the after group.) T= (Type an integer or a decimal.) Stem-and-leaf displays After Change 3 4 3 6 4 133 4 55567 5 00134 5 7778 6 012 6 9 Before Change 2 55 3 000 3 588 4 1112344 4 689 5 02 5 79 6 0 Full data set O - X
The owner of a food store was concerned about her sales of a yogurt. To help boost sales, she decided to place the product on a different shelf. She kept track of sales (number of containers sold per week) for six months after she made the change. The values are in a stem-and-leaf display, along with the sales numbers for the six months prior to making the change. Do these results suggest that sales are better after the change? Test an appropriate hypothesis and state your conclusion. Be sure to check assumptions and conditions. Assume α=0.05. Click the icon to view the stem-and-leaf displays. Are the assumptions satisfied? OA. Yes, the assumptions are satisfied because the data values are independent and the data are appropriately paired. OB. Yes, the assumptions are satisfied because the data are approximately normal. OC. No, the assumptions are not satisfied because the data are approximately normal. D. No, the assumptions are not satisfied because the data are not a random sample, but they may be representative and sufficient to answer the owner's question. E. Yes, the assumptions are satisfied because the experiment was randomized, so it can be assumed that the data values are independent and the two groups are independent. What are the hypotheses for this test? OA. Ho: One distribution is shifted in location higher or lower than the other HA: The two samples are from the same distribution B. Ho: The two samples are from the same distribution HA: The after distribution is higher than the before distribution O C. Ho: The after distribution is lower than the before distribution HA: The two samples are from the same distribution O D. Ho: The two samples are from the same distribution HA: The two samples are not from the same distribution G Find the test statistic. (If there is no smaller group, use the after group.) T= (Type an integer or a decimal.) Stem-and-leaf displays After Change 3 4 3 6 4 133 4 55567 5 00134 5 7778 6 012 6 9 Before Change 2 55 3 000 3 588 4 1112344 4 689 5 02 5 79 6 0 Full data set O - X
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
Transcribed Image Text:The owner of a food store was concerned about her sales of a yogurt. To help boost sales, she decided to place the product on a different shelf. She kept track of sales (number of containers sold per week) for six months after she made the change. The values are in
a stem-and-leaf display, along with the sales numbers for the six months prior to making the change. Do these results suggest that sales are better after the change? Test an appropriate hypothesis and state your conclusion. Be sure to check assumptions and conditions. Assume
α = 0.05.
Click the icon to view the stem-and-leaf displays.
Are the assumptions satisfied?
O A. Yes, the assumptions are satisfied because the data values are independent and the data are appropriately paired.
B.
Yes, the assumptions are satisfied because the data are approximately normal.
O C.
No, the assumptions are not satisfied because the data are approximately normal.
D. No, the assumptions are not satisfied because the data are not a random sample, but they may be representative and sufficient to answer the owner's question.
E. Yes, the assumptions are satisfied because the experiment was randomized, so it can be assumed that the data values are independent and the two groups are independent.
What are the hypotheses for this test?
O A. Ho: One distribution is shifted in location higher or lower than the other
HA: The two samples are from the same distribution
B. Ho: The two samples are from the same distribution
HA: The after distribution is higher than the before distribution
O C. Ho: The after distribution is lower than the before distribution
HA: The two samples are from the same distribution
O D. Ho: The two samples are from the same distribution
HA: The two samples are not from the same distribution
C
Find the test statistic. (If there is no smaller group, use the after group.)
T= (Type an integer or a decimal.)
Stem-and-leaf displays
After Change
3 4
3 6
4 133
4 55567
5 00134
5 7778
6 012
6 9
Before Change
2 55
3 000
3 588
4 1112344
4 689
5 02
5 79
6 0
Full data set
D
-
X
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 3 steps
Recommended textbooks for you
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman