What is a t-test and when should I use it?

What is a t-test and when should I use it?

A t-test is a statistical test used to compare the means of two groups. You should use it when you want to determine if there is a significant difference between the means of these groups.

Can you explain the different types of t-tests?

Sure! There are three main types: independent t-test, paired t-test, and one-sample t-test. The independent t-test compares means from two different groups, the paired t-test compares means from the same group at different times, and the one-sample t-test compares the mean of a single group against a known value.

How do I perform a t-test in Python?

You can use the scipy.stats library in Python. For example, you can use scipy.stats.ttest_ind() for an independent t-test.

What assumptions do I need to check before performing a t-test?

You should check for normality of the data, homogeneity of variances, and that the samples are independent.