Medicine: Medical researchers claim that when people with colds are treated with echinacea, Business: A newspaper headline makes the claim that most workers get their jobs through Increase the probability of having a baby girl. The main objective of this chapter is to develop the ability to conduct hypothesis tests for claims made about a population proportion p, a population mean, or a population standard deviation.Įxamples of Hypotheses that can be Tested: Genetics: The Genetics & IVF Institute claims that its XSORT method allows couples to
A hypothesis test is a standard procedure for testing a claim about a property of a population.
What is a Hypothesis Test? In statistics, a hypothesis is a claim or statement about a property of a population. In Chapter 7 we presented methods for estimating a population parameter with a confidence interval, and in this chapter we present the method of hypothesis testing. The two main activities of inferential statistics are using sample data to (1) estimate a population parameter (such as estimating a population parameter with a confidence interval), and (2) test a hypothesis or claim about a population parameter. Methods of inferential statistics use sample data to make an inference or conclusion about a population. Overview: In previous chapters we used descriptive statistics when we summarized data using tools such as graphs, and statistics such as the mean and standard deviation.
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