6. Make a scatterplot with a regression line, using happiness as the explanatory variable and life expectancy as the response variable. Identify the correlation and regression equation. NOTE: once you click on the data set in the dropdown menu, you will need to click on Switch Variables to have Happiness show on the horizontal (explanatory variable) axis. ? Include a screenshot of your Statkey output, including graph and summary statistics, with your quiz submission. Correlation: Regression equation: 7. Interpret the slope of the regression line in context. Remember that an interpretation must include a number and units, in a sentence that explains the meaning. (See the Sentence Template document if you need help).

8. Use the regression line to predict the life expectancy for a country with a mean happiness index of 5. Show your calculation.

9. Is the prediction you found in (8) likely to be close to the actual life expectancy for a country with a mean happiness index of 5? Explain how you know based on the graph and correlation value.

StatKey Descriptive Statistics for Two Quantitative Variables Happy Planet Index (Happiness vs LifeExpectancy) * Show Data Table Edit Data Upload File Change Column(s) Summary Statistics Switch Variables 80 Statistic Happiness LifeExpectancy Mean 5.919 67.838 Standard Deviation 1.373 11.042 75 Sample Size 143 Correlation 0.832 Slope 5.693 70 Intercept 28.223 Scatterplot Controls 65 Show Regression Line LifeExpectancy 60 55 50 45 40 3.0 4.0 5.0 6.0 7.0 8.0 Happiness