Some people argue that the Welch’s t-test should be the default choice for comparing the means of two independent groups since it performs better than the Student’s t-test when sample sizes and variances are unequal between groups, and it gives identical results when sample sizes are variances are equal. In practice, when you are comparing the means of two groups it’s unlikely that the standard deviations for each group will be identical. This makes it a good idea to just always use Welch’s t-test, so that you don’t have to make any assumptions about equal variances.

T-Test: What It Is With Multiple Formulas and When To Use Them

An Introduction to t Tests | Definitions, Formula and Examples

In this case, for a test to be statistically significant, p-value must be lower than 0.05.

We are 99% confident that the true average “attitude” difference betweenliving environments is between 1.32 and 7.88. At a significance level of 0.01we can say that living in a minority environment is associated with higherscore

How to do t test in google sheets

Essentially, a t-test allows us to compare the average values of the two data sets and determine if they came from the same population.

The GROUPS subcommand specifies an unknown variable or a long string variable.