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BSTAT Midterm- Lowery

Terms in this set (61)

Measures of Centrality
Mean
Median
Mode
Mean
- Sum of all the values in the population/sample
divided by the number of values
Median
Middle value in a set of ordered data (key word: ordered)
Mode
Number/value that occurs most frequently (can be bi-modal or have no mode)
Measures of Dispersion
Variance
Standard Deviation
Range
Variance
Average squared distance from the mean
Standard Deviation
Positive square root of the variance
Range
Highest # minus the lowest #
Sample
A portion, or part, of the population of interest
Population
The entire set of individuals/objects of interest.
Statistic
A characteristic of a sample
Parameter
A characteristic of a population
Data
1. Qualitative: Attribute
2. Quantitative: Numerical (discrete & continuous)
Levels of measurement
1. Nominal (lowest level)
2. Ordinal
3. Interval
4. Ratio (highest level)
Nominal
-Labels or names
-No order
-Can only be classified and counted
(Ex: classification of the 6 M&M colors)
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