Southern New Hampshire University Interpreting Multiple Regression Models Report

by | Mar 5, 2023 | Mathematics

Description

evaluate the significance of individual predictors. You will use output of Python script from Module Six to perform individual t-tests for each predictor variable. Specifically, you will look at Step 5 of the Python script to answer all questions in the discussion this week.

In your initial post, address the following items:

  1. Is at least one of the two variables (weight and horsepower) significant in the model? Run the overall F-test and provide your interpretation at 5% level of significance. See Step 5 in the Python script. Include the following in your analysis:
    1. Define the null and alternative hypothesis in mathematical terms and in words.
    2. Report the level of significance.
    3. Include the test statistic and the P-value. (Hint: F-Statistic and Prob (F-Statistic) in the output).
    4. Provide your conclusion and interpretation of the test. Should the null hypothesis be rejected? Why or why not?
  2. What is the slope coefficient for the weight variable? Is this coefficient significant at 5% level of significance (alpha=0.05)? (Hint: Check the P-value, P is greater than the absolute value of t, for weight in Python output. Recall that this is the individual t-test for the beta parameter.) See Step 5 in the Python script.
  3. What is the slope coefficient for the horsepower variable? Is this coefficient significant at 5% level of significance (alpha=0.05)? (Hint: Check the P-value, P is greater than the absolute value of t, for horsepower in Python output. Recall that this is the individual t-test for the beta parameter.) See Step 5 in the Python script.
  4. What is the purpose of performing individual t-tests after carrying out the overall F-test? What are the differences in the interpretation of the two tests?
  5. What is the coefficient of determination of your multiple regression model from Module Six? Provide appropriate interpretation of this statistic.

In your follow-up posts to other students, review your peers’ results and provide some analysis and interpretation:

  1. Interpret your peer’s coefficient of determination. How does it compare with yours?
  2. How do the results of your peers’ t-tests compare with yours?
  3. Would you recommend this regression model to the car rental company? Why or why not?

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