Explore BrainMass
Share

# Regression analysis fresh detergent demand data

This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

Hello,

I have been asked to do this question in MEGASTAT, which is an add-on to Excel. The problem here is I don't know how to use MEGASTAT that well. I am hoping someone could complete this textbook question using Megastat, and show how they got the answer and graphs.

Thank you.
The Fresh Detergent Case

The following information gives the output of residual diagnostics that are obtained when the simple linear regression models fit to the fresh detergent demand data. Create and interpret the diagnostics and determine of they indicate any violations of the regression assumptions.

With the following data
PriceDif Demand
-0.05 7.38
0.25 8.51
0.60 9.52
0.00 7.50
0.25 9.33
0.20 8.28
0.15 8.75
0.05 7.87
-0.15 7.10
0.15 8.00
0.20 7.89
0.10 8.15
0.40 9.10
0.45 8.86
0.35 8.90
0.30 8.87
0.50 9.26
0.50 9.00
0.40 8.75
-0.05 7.95
-0.05 7.65
-0.10 7.27
0.20 8.00
0.10 8.50
0.50 8.75
0.60 9.21
-0.05 8.27
0.00 7.67
0.05 7.93
0.55 9.26

Create a
1.
Normal Probability Plot of residuals
X-axis- Residual
Y axis- Percent

2. Residua vs. Fitted Values
x- axis - Fitted value
y- axis- Residual

3.
Histogram of Residuals
x-axis- residual
y- axis- frequency

4.
Residuals vs. Order of the data
x. axis- Observation order
y-axis Residual

© BrainMass Inc. brainmass.com March 21, 2019, 3:32 pm ad1c9bdddf
https://brainmass.com/statistics/regression-analysis/regression-analysis-fresh-detergent-demand-data-155413

#### Solution Summary

Step by step method for regression analysis is discussed here. Regression coefficients, coefficient of determination, scatter diagram and significance of regression model are explained in the solution.

\$2.19