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

**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

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.

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.

- 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).

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

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