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# tTest - Using Your TI-83/84 Calculator for Hypothesis...

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Using Your TI-83/84 Calculator for Hypothesis Testing: The One-Sample t Test Dr. Laura Schultz The one-sample t test is used to test hypotheses regarding population means. This handout will take you through one of the examples we will be considering during class. Consult your lecture notes for more details regarding the non-calculator-related aspects of this specific hypothesis test. Researchers at the University of Maryland recorded body temperatures from a random sample of 93 healthy adults. They obtained a sample mean of ¯ x = 98 . 12 , with a standard deviation of s = 0.65 . Use this sample data to test the hypothesis that the mean ( μ ) body temperature of all healthy adults is actually less than 98.6 . Working from Summary Statistics 1. Before you can proceed with entering the data into your calculator, you will need to symbolize the null and alternative hypotheses. For this example, let’s define μ as the mean body tempera- ture of all healthy adults. Then, we can symbolize our null hypothesis ( H 0 ) as μ = 98.6 and our alternative hypothesis ( H 1 ) as μ < 98.6 . 2. Press S and use > to scroll right to the TESTS menu. Then, scroll down to 2:T-Test and press e . 3. Your calculator will prompt you for the following information:

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tTest - Using Your TI-83/84 Calculator for Hypothesis...

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