Lecture 4 Flashcards
1
Q
Variance
A
…
2
Q
median
A
divides set into two
3
Q
outlier
A
an extreme observation smaller than quartile1 or larger than quartile 3
4
Q
standard deviation
A
the measure of how far or dispersion of a set of data from its mean
5
Q
variance
A
- find mean
- subtract all numbers from mean
- square found numbers
- add results
- divide the sum by the numbers in the set
6
Q
formula: mean
A
add up all and divide by the amount there is
7
Q
standard deviation: formula
A
square root of variance
8
Q
sample variance: how to
A
- find mean
- subtract all numbers from mean
- square found numbers
- add results
- divide the sum by the numbers in the set minus 1
9
Q
sample standard deviation: formula
A
square root of sample variance
