Loading
Page
Description
The major shopping areas in the community of Springdale include Springdale Mall, West Mall, and the downtown area on Main Street. A telephone survey has been conducted to identify strengths and weaknesses of these areas and to find out how they fit into the shopping activities of local residents. The 150 respondents were also asked to provide information about themselves and their shopping habits. The data are provided in the file SHOPPING. The variables in the survey can be found in the file CODING.
In this exercise, some of the estimation techniques presented in the module will be applied to the Springfield Shopping survey results. You may assume that these respondents represent a simple random sample of all potential respondents within the community, and that the population is large enough that application of the finite population correction would not make an appreciable difference in the results.
Managers associated with shopping areas like these find it useful to have point estimates regarding variables describing the characteristics and behaviors of their customers. In addition, it is helpful for them to have some idea as to the likely accuracy of these estimates. Therein lies the benefit of the techniques presented in this module and applied here.
- Item C in the description of the data collection instrument lists variables 7, 8, and 9, which represent the respondent’s general attitude toward each of the three shopping areas. Each of these variables has numerically equal distances between the possible responses, and for purposes of analysis they may be considered to be of the interval scale of measurement.
- Determine the point estimate, and then construct the 95% confidence interval for µ7 = the average attitude toward Springdale Mall.
- Repeat part (a) for µ8 and µ9, the average attitudes toward Downtown and West Mall, respectively.
- Given the breakdown of responses for variable 26 (sex of respondent), determine the point estimate, and then construct the 95% confidence interval for p26 = the population proportion of males.
- Given the breakdown of responses for variable 28 (marital status of respondent), determine the point estimate, and then construct the 95% confidence interval for p28 = the population proportion in the “single or other” category.
- Assume the managers have requested estimates of the mean attitudes towards each mall with a margin of error of 0.05 for each. If the managers want to have 95% confidence that the sample mean will fall within this margin of error, how large should the sample size be for each mall?
User generated content is uploaded by users for the purposes of learning and should be used following Studypool's honor code & terms of service.
Explanation & Answer
Please check the solution and let me know if you have any doubt. I hope you will like my work. If everything is clear to you, then please take a few seconds and provide your valuable feedback.Thank you.
SPRILIKE
4
5
5
2
3
5
4
4
5
4
3
3
3
3
4
4
4
4
4
4
4
4
5
2
4
4
4
4
4
3
4
4
5
3
4
4
5
4
3
4
4
5
3
4
4
4
4
Solution of 1.a.
mean = 3.6467
standard deviation = 1.2539
95% confidence interval =
[3.4444, 3.8490]
DOWNLIKE
4
4
3
4
3
5
2
3
4
4
3
4
4
2
3
3
4
4
4
3
3
3
3
5
3
4
3
4
4
5
4
4
3
3
4
5
3
3
2
4
3
5
5
2
3
4
4
Solution of 1.b.i.
mean = 3.4267
standard deviation = 1.1490
95% confidence interval =
[3.2413, 3.6120]
5
1
2
5
3
1
5
4
5
2
1
3
3
3
5
1
1
3
2
4
4
3
4
2
1
5
5
1
3
4
5
4
1
1
2
3
1
1
3
3
2
1
1
1
3
1
5
5
1
4
3
2
5
4
4
2
5
4
3
1
5
1
1
3
3
2
5
5
1
5
2
1
4
5
1
5
5
4
1
4
5
1
5
1
3
3
5
4
2
5
1
5
2
2
3
2
3
1
5
4
5
5
5
4
4
4
4
4
4
5
4
5
4
5
4
5
5
5
5
4
4
4
4
4
3
5
4
3
4
4
3
3
5
5
5
5
5
4
3
4
4
4
5
5
4
2
4
3
4
3
3
4
3
4
4
2
3
3
3
3
3
4
5
3
4
4
4
4
4
5
3
4
3
2
3
4
3
4
4
3
5
4
3
1
3
3
5
4
3
5
4
4
5
5
1
4
5
5
3
5
4
5
3
3
2
5
WESTLIKE
4
3
4
3
3
3
4
3
4
3
3
3
3
3
4
2
4
3
3
1
2
3
4
4
2
4
3
4
5
3
3
4
3
2
3
4
4
3
1
4
4
5
3
4
3
4
3
Solution of 1.b.ii.
mean = 3.1600
standard deviation = 1.1648
95% confidence interval =
[2.9721, 3.3479]
4
3
5
5
1
3
2
2
3
5
5
2
4
3
2
2
4
1
4
4
3
4
4
4
2
1
1
1
5
2
3
3
1
1
3
3
4
2
3
5
4
1
5
1
2
3
4
5
5
1
3
3
4
3
3
4
5
4
5
3
1
4
4
1
4
4
3
4
2
2
3
3
2
1
1
1
3
4
3
5
3
4
4
3
2
5
3
4
4
5
3
2
2
4
4
4
5
2
1
4
4
3
3
RESPGEND
2
2
1
2
2
2
2
2
1
2
2
2
2
2
1
1
2
2
2
2
1
1
2
1
2
1
1
1
1
2
1
2
2
2
2
1
2
1
2
2
2
2
1
2
1
2
1
Solution of 2.
sample proportion
of male = 0.4267
95% confidence interval =
[0.34343, 0.50947]
RESPMARI
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
1
2
2
2
2
1
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
1
1
1
1
1
1
2
1
1
1
1
Solution of 3.
sample proportion for
single or other category
0.56
95% confidence interval =
[0.4767, 0.6419]
2
1
1
1
1
1
1
1
2
1
2
1
2
2
1
2
1
2
1
2
2
1
2
2
1
2
1
2
2
2
1
1
2
2
2
1
1
1
1
2
1
2
1
1
2
1
2
1
2
1
2
1
1
1
2
1
1
1
1
1
2
2
2
1
2
1
2
2
2
2
1
2
1
2
1
2
2
1
1
1
2
1
2
1
2
2
2
1
1
2
1
2
1
2
1
1
2
1
1
2
2
2
2
2
2
2
2
2
1
1
1
1
1
2
1
2
1
1
1
2
2
2
1
1
2
2
2
1
1
2
1
2
2
2
2
2
2
1
1
2
2
2
2
1
1
2
1
1
2
2
1
2
1
2
2
1
2
1
2
2
2
1
2
1
2
1
2
2
1
2
2
2
2
1
2
1
2
1
1
1
1
1
2
2
2
1
1
1
2
1
2
1
2
2
2
2
1
1
2
2
1
1
1
1
1
1
Springdale Shopping Survey
The major shopping areas in the community of Springdale include Springdale Mall, West
Mall, and the downtown area on Main Street. A telephone survey has been conducted to
identify strengths and weaknesses of these areas and to find out h...
Review
Review
Anonymous
Just what I needed. Studypool is a lifesaver!
Studypool
4.7
Trustpilot
4.5
Sitejabber
4.4
Most Popular Content
Europe(Continental)