...using a sample.
An investigation looking at comparing one set of numbers that have been divided into two groups.
I wonder if roosters tend to weigh more than hens in the population of all the animals at Old MacDonald's Farm
I wonder if lawyers tend to have higher salaries than doctors in the population of all lawyers and doctors in New Zealand.
I wonder if Mars chocolate bars tend to sell more than Picnic bars in the population of all chocolate sold at New World supermarkets.Â