# Statistics-level of significance and histogram, a normal probability plot

Jul 24th, 2014
RockCafe
Category:
Statistics
Price: \$45 USD

Question description

coding.docxShopping.xlsx Please....only take this post if you can show the work in Excel.

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
shopping habits. The data are provided in the file SHOPPING. The variables in the survey can be found in
the file CODING.

This exercise involves the following variables from data in the Springdale
Shopping Survey:

• Variables 7–9, overall attitude toward the shopping area. The highest
possible rating is 5. In each analysis, one of these will be the  dependent
variable.
• Variables 18–25, the importance (highest rating = 7) placed on each of eight
attributes that a shopping area might possess. In each analysis, one of these
will be the independent variable.

1. With variable 7 (attitude toward Springdale Mall) as the dependent variable,
perform two separate regression analyses—one for each of the independent
variables listed below. In each case, determine and interpret the regression
equation and the coefficients of correlation and determination, then use the
0.05 level of significance in reaching a conclusion on the significance of the
linear relationship. Retain the residuals for analysis in question 2 (In Excel,
click in each of the boxes under Residuals and Normal Probability in the
Regression function that is found in Data Analysis under Data in Excel).

a. Variable 21 (good variety of sizes/styles).

b. Variable 25 (a lot of bargain sales).

2. For each of the regression analyses in question 1, examine the residuals by
using a histogram, a normal probability plot, and a plot of the residuals
against the values of the independent variable (The histogram function is found
in the Data Analysis button under Data in Excel, and if you selected all of the
correct boxes in #1 you should have the other items already completed in the
Regression area). In each case, comment on whether an assumption of the linear
regression model may have been violated.

3. 3. Repeat questions 1 and 2, using variable 9 (attitude toward West Mall) as

4. the dependent variable

(Top Tutor) Daniel C.
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School: Rice University

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