Misc. Flashcards
1
Q
Taking the average of two sets together, each one has it’s own average
A
If they have the same number of observations in each set, the average will be equivalent to the average of the 2 averages
2
Q
Median of a set of observations with an even number of total observations
A
Median = average of middle 2 observations
3
Q
How to interpret f(f-1) ?
A
Take the function of -1 first, then whatever that value is, plug it in
4
Q
0!=?
A
0!=1
5
Q
Combination v. Permutation
A
Combination = order does NOT matter Permutation = order DOES matter
6
Q
How to solve a combination
A
Factorial of the TOTAL GROUP / (Factorial of SELECTED group X Factorial of UNSELECTED group)
7
Q
How to easily convert fraction to percent
A
Divide it!
8
Q
Ratio problems
A
Use “x” if quantity unknown - e.g.
Ratio of apples to bananas is 3 to 4 becomes 3x to 4x
