![]() ![]() We are testing a claim about a population parameter using a sample statistic. We are testing a claim about a population proportion using a sample proportion. We are testing a claim about a population mean using a sample mean. We are testing a claim about a population variance using a sample variance. We are testing a claim about a population standard deviation using a sample standard deviation.Ī hypothesis test is a procedure for testing a claim about a population parameter. ![]() The null hypothesis is the statement that shows that the value of the population parameter is equal to some claimed value. We test the null hypothesis assuming it to be true. We make a decision based on the null hypothesis. We either reject the null the hypothesis or we do not reject the null hypothesis (or fail to reject the null hypothesis)īased on the result of the methods we used for the test. "Fail to reject the null hypothesis" is the same as "Do not reject the null hypothesis". This does not mean that we accept the null hypothesis. Then, we make a conclusion based on our decision. ![]()
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