Measures of Central Tendency and Variability Flashcards
1
Q
Measure of Central Tendency
A
- gives a summary of the characteristics of a
given set of data - mean, median, and mode
2
Q
Mean
A
One number that represents the whole data
Ø also known as the “average” of data
3
Q
Median
A
Middle number when the data are arranged
in order
4
Q
Mode
A
Score point with the greatest frequency
5
Q
𝑵
A
population size
6
Q
𝒏
A
sample size
7
Q
𝝁
A
population mean
8
Q
𝒙
A
a specific score/value
9
Q
∑
A
summation
10
Q
The lesser the value of the variability,
A
the more consistent, the more homogeneous and the less scattered are the observations in the set of data.
11
Q
If there is a large amount of variation, then on average,
A
the data values will be far from the
mean. Hence, SD will be large.
12
Q
If there is only a small amount of variation, then on average,
A
the data values will be close to the
mean. Hence, SD will be small.
