Significance, Association, Correlation, and Regression

Write: In your initial post of at least 550 words, using Exercise 3 on pages 179-180 and Exercise #3 on page 211, complete the following:

Using Exercise 3 (pages 179-180),
- State the null hypothesis.
- Calculate the difference between the proportions or means.
- Calculate the standard error of the difference in proportions or means.
- Conduct the eyeball test and state whether you would accept the null hypothesis or reject the null hypothesis, and explain you reasoning.
Using Exercise 3 (page 211),
- What is the regression equation for this relationship?
- Interpret the regression equation: What exactly is the effect of x on y? (Look over the Hint provided.)
- Interpret the y-intercept: What does the intercept tell you, exactly?
- Discuss the following: Based on the equation, what is the predicted value of y for census tracts that are 15% low-income? What about census blocks that are 25% low-income?
- Interpret the Adjusted R-square of .94 for these data.