Q1. Determine whether a statistical analysis should best involve examination of the population or of a sample in each case.
a. Average weight of humans on Earth
b. Median income of members of Congress
c. Variance of relative brightness of stars in the Milky Way
Q2. A biologist studying wolves wants to find a correlation between the lifespan of wolves and the geographic latitude of their habitats. How many variables are involved in such an analysis?