# Web Activities

Click on the following links. Please note these will open in a new window.

#### Calculate the regression equation and regression line

Go to this website: http://www.socscistatistics.com/tests/regression/Default.aspx

In Chapter 13, as a class, you computed the correlation between extraversions and status striving. Report the correlation here ______.

Now, using the calculator above and descriptive statistics (e.g., ssx, s2x, s2y, spxy, r, etc.) compute: the 95% confidence interval for b, (i) the 95% confidence interval for ŷ when x = 3, and (j) the 95% prediction interval for ynext when x = 3.

#### Calculate compute regression equation and regression line

Go to this website: http://www.socscistatistics.com/tests/regression/Default.aspx

In Chapter 13, as a class, you computed the correlation between extraversions and life satisfaction. Report the correlation here ______.

Now, using the calculator above and descriptive statistics (e.g., ssx, s2x, s2y, spxy, r, etc.) compute: the 95% confidence interval for b, (i) the 95% confidence interval for ŷ when x = 3, and (j) the 95% prediction interval for ynext when x = 3.

#### Think of a simple question that you can post on social media to determine if you network differs from the general population

Go to this website: http://www.socscistatistics.com/tests/regression/Default.aspx

Think about a simple question you could ask your friends through social media. Before you ask the question, you will need to think of two questions that you believe to be positively or negatively associated. In my experience people are best at estimating how much time (in minutes) and money (in dollars) they do are would like to spend engaged in different activities. Be sure to ask two questions that can be measured and quantified (e.g., you can compute the mean for both questions). Then, post you question online. Using the data your friends report, use the calculator above to determine the regression equation in order to predict ŷ and ynext.