Numerical measures Flashcards
1
Q
Mean
A
Sum of all the data divided by the number of data
2
Q
Median
A
Value in the middle of all the pieces of data
3
Q
Mode
A
Most common data value
4
Q
Range
A
Difference between highest and lowest value
5
Q
Lower quartile
A
25th percentile of the data
6
Q
Upper quartile
A
75th percentile of the data
7
Q
Interquartile range
A
Difference between upper and lower quartile
8
Q
Discrete data
A
Data which can be counted
9
Q
Continuous data
A
Data which can take any value
10
Q
What is y bar?
A
The mean of all the y values
11
Q
What is sigma y?
A
Standard deviation of the y values
12
Q
Outlier
A
Extreme piece of data which differs significantly from the other data values
13
Q
Advantage for mode
A
Can be used for non numerical data
14
Q
Disadvantage for mode
A
Not very informative if frequencies are low
15
Q
Advantage for median
A
Not affected by outliers
