6.12 Exercises

6.12.1 Exercise

Make a histogram, Q-Q plot, and a box-plot for the life expectancy for a continent of your choice, but for all years. Do the data appear normally distributed?

6.12.2 Exercise

  1. Select any 2 years in any continent and perform a t-test to determine whether mean life expectancy is significantly different. Remember to plot your data first.

  2. Extract only the p-value from your t.test() output.

6.12.3 Exercise

In 2007, in which continents did mean life expectancy differ from 70.

6.12.4 Exercise

  1. Use ANOVA to determine if the population changed significantly through the 1990s/2000s in individual continents.