Mean/Median (5) Flashcards
1
Q
Median
A
In an even number of terms, its the average of the two middle terms
2
Q
In an evenly spaced set…
A
Mean and median will be the same
3
Q
Sum of all even integers between 2 & 100, inclusive? Exclusive?
A
Sum of values = average x # of values. Average = 100 + 2 / 2 = 51 # of values = Range (in this case, R/2 bc even only). Add 1 for inclusive, -1 for exclusive.
4
Q
If given # of values in a problem…
A
Don’t auto think to plug in range for solving somewhere. You already have that variable!
5
Q
If all terms of a set are multiplied by a constant…
A
New average can be derived by multiplying the initial mean by same constant.
6
Q
With mean problems…be ready to…
A
Convert between average and sum of values. Whichever they give you, it is usually easier to work with the other
7
Q
When in doubt
A
Write it out.
8
Q
Questions designed to look abstract
A
Just start writing. Often times you are rewarded for just getting started
