Stats Test

Question 1

Spearman’s rank: What is it used for?

Answer 1

Tests whether there is a correlation (a relationship or trend) between two variable
Example: Is there a correlation between light intensity and the number of plant species

Question 2

Student’s t-Test: when to use?

Answer 2

You’re comparing the means of two groups.
Example: Is there a significant difference in the mean growth of plants with and without fertiliser?
“T-test = Two Totally different means?”

Question 3

Chi-Squared (χ²) Test: when to use?

Answer 3

Whether observed results are significantly different from expected results
Data is in categories (not numbers or means).