How do you do t test with unequal variance in Excel?

t-Test

First, perform an F-Test to determine if the variances of the two populations are equal.
On the Data tab, in the Analysis group, click Data Analysis.
Select t-Test: Two-Sample Assuming Unequal Variances and click OK.
Click in the Variable 1 Range box and select the range A2:A7.

What is t test for unequal variances?

The unequal variance t test reports a confidence interval for the difference between two means that is usable even if the standard deviations differ. Both t tests report both a P value and confidence interval. When the two groups have the same sample size, the standard error is identical for the two t tests.

How do you find the equal or unequal variance for a t test?

There are two ways to do so:

Use the Variance Rule of Thumb. As a rule of thumb, if the ratio of the larger variance to the smaller variance is less than 4 then we can assume the variances are approximately equal and use the Student’s t-test.
Perform an F-test.

What does T Dist calculate in Excel?

The Excel T. DIST function calculates the one-tailed Student’s T Distribution, which is a continuous probability distribution that is frequently used for testing hypotheses on small sample data sets. The value at which you want to evaluate the distribution.

What is the difference between t test equal variance and unequal variance?

The Two-Sample assuming Equal Variances test is used when you know (either through the question or you have analyzed the variance in the data) that the variances are the same. The Two-Sample assuming UNequal Variances test is used when either: You do not know if the variances are the same or not.

What do unequal variances mean?

The conservative choice is to use the “Unequal Variances” column, meaning that the data sets are not pooled. This doesn’t require you to make assumptions that you can’t really be sure of, and it almost never makes much of a change in your results.

What is the difference between t-test equal variance and unequal variance?

What is the difference between t-test equal variance and UNequal variance?

Can you do a t-test with unequal sample sizes?

Even though you can perform a t-test when the sample size is unequal between two groups, it is more efficient to have an equal sample size in two groups to increase the power of the t-test. Welch’s t-test is for unequal variance data.

What is the difference between T Dist and Tdist in Excel?

In Excel 2010, the TDIST function has been replaced by two functions, the T. DIST. RT function (which calculates the right-tailed Student’s T-Distribution), and the T. 2T function (which calculates the two-tailed Student’s T-Distribution).