In this module, you will compare means for more than two groups and perform hypothesis tests for variances. For example, researchers may wonder if the mean amount of time spent training is the same for all age groups of runners participating in a marathon. They may also want to know if the variability in race times is the same for people who identify as males as for people who identify as females.

Calculations for these tests can involve fractions, decimals, and exponents. In this review section, we’ll review ordering decimals and fractions and simplifying expressions containing decimals and fractions using the order of operations.