Essay Statistic Project Part "C"

6. Analyze results - Graph the data from Table 4 and describe what your graph looks like (you do not have to submit a picture of the actual graph!).

Due to financial hardship, the Nyke shoe company feels they only need to make one size of shoes, regardless of gender or height. They have collected data on gender, shoe size, and height and have asked you to tell them if they can change their business model to include only one size of shoes – regardless of height or gender of the wearer. In no more 5-10 pages (including figures), explain your recommendations, using statistical evidence to support your findings. The data found are below:

4. For the questions 1-3 we found out a couple different cost functions that could be useful for Delta when predicting salaries for 2003 and 2004. The multiple regressions may be most reliable considering it uses multiple variables, but the single R square is better than multiple regressions.

6. Although you are basically satisfied with the analysis thus far, you are concerned about the

4. Based on your analysis in (1) – (3) above, what is your overall conclusion regarding the

Exercises 12.17, 12.21, and 12.43 require the use of the “Regression” function within the Data Analysis menu in Excel. Refer to Appendix E12 for instructions on using Excel for these exercises.

d. How many creditors have made inquiries about Jessie Robinson 's credit? (0.5 points) N/A

15 people of 50 surveyed live in a suburban community, so I will be conducting a t-test because 15<30.

4) Use exponential regression (or find a constant ratio) to determine an equation for the data.

Using MINITAB run the multiple regression analysis using the variables CALLS, TIME, and YEARS to predict SALES. State the equation for this multiple regression model.

A pharmaceutical company is testing the effectiveness of a new drug for lowering cholesterol. As part of this trial, they wish to determine whether there is a difference between the effectiveness for women and for men. Using   = .05, what is the value the test statistic?

This shows that using the model with all eight variables included 63.8% of the variation in profitability may be explained. This suggests that the model may be valid in explaining the impact on profitability. In addition to this, from Table 3 it may be seen that the value of the F-test statistic is 14.53, with a significance of less than 0.05 which also shows that the model is significant.

2. Use simple regression to estimate the salary cost function for Delta Airlines. Comment on the statistical validity and significance of your results. What are the

Using the same market risk premium and risk free rate (5.5% & 4.62% respectively) given in the case, the averaged beta of 1.40, the pretax cost of debt of 7.65%, and the weighted average of debt & equity, the products & systems

The procedure for this model is to collect several periods of history relating to the independent and dependent variables themselves, establish the relationship that minimizes mean squared error of forecast vs actual using linear or non-linear and singular or multiple regression analysis.