5 Questions
Which term refers to the spread of values on either side of the center of a distribution?
Dispersion
Which measure of variability is a numerical value used to indicate how widely individuals in a group vary?
Variance
What does a large variance indicate?
Low uniformity of the items
Which measure of variability provides a measure of the degree to which scores in a distribution vary?
Standard deviation
What does a small standard deviation indicate?
High uniformity of the items
Study Notes
Measures of Variability
- The spread of values on either side of the center of a distribution is referred to as variability.
- Variability is a measure that indicates how widely individuals in a group vary, and it is represented by a numerical value.
- Variance is a measure of variability that indicates the spread of values in a distribution.
- A large variance indicates that the data points are widely spread out, while a small variance indicates that the data points are closer to the mean.
- Standard deviation is another measure of variability that provides a measure of the degree to which scores in a distribution vary.
- A small standard deviation indicates that the data points are closer to the mean, while a large standard deviation indicates that the data points are more dispersed.
- In general, measures of variability help to understand the spread of data and give insights into how individual data points differ from the average value.
Test your knowledge on measures of variability such as mean deviation, variance, and standard deviation. Learn how to determine the spread of data points in a distribution and understand the concept of dispersion.
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