Permutations & Combinations
Aside from probability, Permutations and Combinations are essential tools for statistics.
Permutations
Combinations
It’s easy but always confusing if you haven’t yet totally understood it in the first place.
The very first thing to do for solving a probability problem, is to CATEGORISE the problem and apply different formula.
Refer to Khan academy course.
Types of studies:
Sample study
Observational studies
A Stem and Leaf Plot is a special table where each data value is split into a "stem" (the first digit or…
Stem and Leaf Plot
Box plots
Quartiles