# Question: For the 33 nations in Example 7 we found a

For the 33 nations in Example 7, we found a correlation of 0.682 between Internet use and Facebook use (both as percentages of population). The regression equation is predicted Facebook use = 3.09 + 0.460 Internet use

a. Based on the correlation value, the slope had to be positive. Why?

b. Indonesia had an Internet use of 10.5% and Facebook use of 13.49%. Find its predicted Facebook use based on the regression equation.

c. Find the residual for Indonesia. Interpret.

a. Based on the correlation value, the slope had to be positive. Why?

b. Indonesia had an Internet use of 10.5% and Facebook use of 13.49%. Find its predicted Facebook use based on the regression equation.

c. Find the residual for Indonesia. Interpret.

## Answer to relevant Questions

Every General Social Survey includes the question, “Taken all together, would you say that you are very happy, pretty happy, or not too happy?” The table uses the 2008 survey to cross-tabulate happiness with family ...Each month, the owner of Fay’s Tanning Salon records in a data file y = monthly total sales receipts and x = amount spent that month on advertising, both in thousands of dollars. For the first three months of operation, ...Is there a relationship between the weight and price of a mountain bike? This question was considered in Exercise 3.21. We will analyze the Mountain Bike data file on the text CD. (The data also were shown in Exercise ...The figure shows recent data on x = the number of televisions per 100 people and y = the birth rate (number of births per 1000 people) for six African and Asian nations. The regression line, ŷ = 29.8 - 0.024x applies to the ...The table shows a small data set that has a pattern somewhat like that in Figure 3.22 in Example 14. As in that example, education is measured as the percentage of adult residents who have at least a high school degree. ...Post your question