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Unit 1 - Statistics (Measures of Central Tendency (Median (central value)…
Unit 1 - Statistics
Measures of Central Tendency
Median
central value
Mode
most popular value
Range
maximum value - minimum value
Spread
describes the variability of a data set
Mean
sum of values / number of values
Data
Percentiles
The percentage of a certain element in a data set
Grouped data
Data divided in two or more categories
Raw data
Data that is not organized in any form
Population
All the elements from a data set
Sample
Elements selected randomly from a data set
Graph
Box Plot
A way of showing the distribution of a data set based on five values:
Minimum
First Quartile
Median
Third Quartile
Maximum
Histogram
A graph that shows the frequency distribution of a set of continuous data
Cumulative Frequency Graph
A way to show cumulative information graphically
Data Types
Qualitative
Quality (categorical)
Quantitative
Quantity (numerical)
Frequency
Cumulative Frequency
The sum of all the previous frequencies up to the current poin
Box Plot
Interquartile Range (IQR)
it is equal to the difference between upper and lower quartiles (IQR = Q3 - Q1)
