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Statistics #1
Binomial theorem, variables, charts.
| Term | Definition |
|---|---|
| What is the binomial theoum? | (x+y)^n |
| First four lines of Pascal's Triangle. | 1, 1-1, 1-2-1, 1-3-3-1, 1-4-6-4-1 |
| Permutation patterns for ordering 2 people, 3 people, 4 people, and 5 people ___ # of ways. | 2 ways = 2 ppl = 2(1) = 2! ; 6 ways = 3 ppl = 3(2)1 = 3! ; etc. |
| How many different ways can you select president and vice president from a pool of five people? | 5nPr3 = 60 |
| What is the original permutation formula? | nPr = (n!) / (n-r)! |
| How many different ways can you select 2 people from a pool of five? | (5P2) / (2!) = 10 = 5C2 |
| What is the combination formula? | nCr = nC(n-r) = (nPr) / (n!) |
| In permutation does order matter? | yes |
| In combination does order matter? | no |
| Define categorical (qualitative) data | The numbers are just labels and their values are arbitrary. Ex: dog's gender, color, and breed. |
| Define quantitative data | Variables recorded in numbers are called quantitative variables Ex. Incomes, heights, weights, ages. |
| What is the purpose of a frequency table? | To count and record data |
| What is a relative frequency table? | has percentages |
| What is cumulative related frequency table? | Add the person previous to the next value. Ex: red = 30%, gray = 80%, blue = 100% |
| What is a Contingency table? | A table which shows how the individuals are distributed along each variable, contingent on the value of the other variable. |
| What is the formula for marginal distribution? | Margins / grand total |
| What is conditional distribution? | cell value / margin |
Created by:
yinyang2424
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