What you’ll learn to do: Determine the null and alternative hypotheses given a claim about a mean and a proportion

Manatees move slowly and are often injured by boats. If the proportion of manatees who are injured is more than 50%, then laws might be enacted to reduce the risk of injury by boats. Hypothesis testing is used to analyze data to see if it supports a specific claim. In this case, our claim would be that p > 0.50, where p is the true proportion of injured manatees. In this section, you will learn how to write null and alternative hypotheses based on various claims.