Measures of Dispersion Flashcards
1
Q
If the mean is our measure of central tendency then we use?
A
Variance and Standard Deviation
2
Q
If the median is our measure of central tendency then we use
A
Percentiles, Quartiles and IQR
3
Q
What % of observations are within 1 standard deviation of the mean
A
68%
4
Q
What % of observations are within 2 standard deviation of the mean
A
95%
5
Q
What % of observations are within 3 standard deviation of the mean
A
99.7%
6
Q
What is a percentile?
A
The value that a certain percentage of observations are less than.
7
Q
A
