The world health organization wishes to estimate the mean density of people per square kilometer, they collect data on 56 countries. state the individual, variable, population, sample, parameter, and statistic
a) set of densities of people per square kilometer of all countries
b) set of densities of people per square kilometer of 56 countries
c) country
d) mean density of people per square kilometer of all countries
e) density of people per square kilometer
f) mean density of people per square kilometer of 56 countries
