Q8.2 It is reported that Argentina has a life expectancy of 69 years and a happiness score of 5.93 points. What is the predicted happiness score for Argentina?

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Q8.3

Using the regression model, we predicted a happiness score of 6.5 points for Canada. The corresponding residual was calculated to be 0.603 points. What was the observed happiness score for Canada?

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Q8.4

Select the option that best completes this statement:

____ of the variation in ____ is explained by the linear relationship with ____.

55.9%, life expectancy, happiness score

55.9%, happiness score, life expectancy

55.3%, life expectancy, happiness score

55.3%, happiness score, life expectancy

74.8%, life expectancy, happiness score

74.8%, happiness score, life expectancy

Scatterplot of Life Expectancy versus Happiness Score for a Sample of 80 Countries OO og O C OO O oo O O OO O O O O O OO O O Happiness Score (out of 10 points) LO O O O O O O O OO O O 70 75 65 50 55 60 Life Expectancy (in years)Call: 1m(formula = Happiness. score ~ Life. expectancy, data = happiness) Residuals: Min 1Q Median 3Q Max -1. 3949 -0. 5823 0. 0187 0. 5864 1.2539 Coefficients: Estimate Std. Error t value Pr (>|t/) (Intercept) -2. 5596 0. 8112 -3. 16 0. 0023 *# Life. expectancy 0. 1228 0. 0123 9.95 1. 6e-15 *#* Signif. codes: 0 '* * * ' 0.001 '**' 0.01 '# ' 0.05 ' . ' 0.1 . ' 1 Residual standard error: 0.72 on 78 degrees of freedom Multiple R-squared: 0.559, Adjusted R-squared: 0.553 F-statistic: 98.9 on 1 and 78 DF, p-value: 1.6e-15