Our calculator will automatically produce the results of the two sample t-test: Lastly, highlight Calculate and press ENTER. P ooled: Choose whether you want to pool the variances of the two groups or not.This indicates that our alternative hypothesis is μ1≠μ2. The other two options would be used for left-tailed tests (μ1μ2). Since we are performing a two-tailed test, we will highlight ≠ μ2 and press ENTER. μ1:The alternative hypothesis to be used.n2: The sample size of the second group.Sx2: The sample standard deviation of the second group.x2: The sample mean of the second group.n1: The sample size of the first group.Sx1: The sample standard deviation of the first group.x1: The sample mean of the first group.In this case, we will highlight Stats and press ENTER. Inpt: Choose whether you are working with raw data (Data) or summary statistics (Stats).
The calculator will ask for the following information: Scroll down to 2-SampTTest and press ENTER. Use this data to perform a two sample t-test to determine if the average mpg is different between the two groups. For the treatment group, the mean mpg is 22.75 mpg and the standard deviation is 3.25 mpg. For the control group, the mean mpg is 21 mpg and the standard deviation is 2.73 mpg. To test this, they conduct an experiment in which 12 cars receive the new fuel treatment and 12 cars do not. Researchers want to know if a new fuel treatment leads to a change in the average mpg of a certain car. Example: Two Sample t-test on a TI-84 Calculator
#XLSTAT VS. GRAPHING CALCULATOR HOW TO#
This tutorial explains how to conduct a two sample t-test on a TI-84 calculator.
A two sample t-test is used to test whether or not the means of two populations are equal.
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