Today I started learning about the various T-tests and when to use them
- T-test is a statistical test which is used to compare the mean values of two groups. To do this we create two hypothesis:
H0 = there being no significant difference
H1 = there being a significant difference
The different types of data would indicate when to use which type of t-test - Paired t test is used when the groups come from a single population (e.g., measuring before and after an experimental treatment) like in the case of the crab molt data
- Two-sample t test also called independent t test is used when the groups come from two different populations ( two different species of animal)
- A one-sample t test is performed if there exists a single group being compared against a standard value
- One-tailed t test should be performed when we want to know if the mean of one group or population is more than or less than the other.
- A two-tailed t test is performed when we you only care to know if the two groups are different from one another