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Flashcards in Misc. Deck (8)
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1

Taking the average of two sets together, each one has it's own average

If they have the same number of observations in each set, the average will be equivalent to the average of the 2 averages

2

Median of a set of observations with an even number of total observations

Median = average of middle 2 observations

3

How to interpret f(f-1) ?

Take the function of -1 first, then whatever that value is, plug it in

4

0!=?

0!=1

5

Combination v. Permutation

Combination = order does NOT matter
Permutation = order DOES matter

6

How to solve a combination

Factorial of the TOTAL GROUP / (Factorial of SELECTED group X Factorial of UNSELECTED group)

7

How to easily convert fraction to percent

Divide it!

8

Ratio problems

Use "x" if quantity unknown - e.g.
Ratio of apples to bananas is 3 to 4 becomes 3x to 4x