Term
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Definition
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Term
| Categorical Data vs. Quantitative Data |
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Definition
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Term
| Examples of Categorical Data |
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Definition
Genres
Types of Cars
Presidents |
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Term
| Examples of Quantitative Data |
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Definition
MPH
Temperature
Time (elapsed) |
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Term
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Definition
| possible values of the variable and the relative frequency of each value |
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Term
| You can't measure a correlation between __________ and _________ data |
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Definition
| categorical and quantitative |
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Term
| Organizing Categorical Data |
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Definition
Frequency Tables
Relative Frequency Table |
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Term
| Understanding Categorical Data |
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Definition
Contingency Table
Marginal Distribution
Conditional Distribution |
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Term
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Definition
| displays the counts of individuals falling into named categories on two or more variables |
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Term
Define:
Marginal Distribution |
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Definition
| distribution of either variable alone |
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Term
Define:
Conditional Distribution |
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Definition
| the distribution of one variable holding the other constant |
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Term
| Visualizing Categorical Data |
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Definition
| bar charts, box and whisker, stem and leaf plots, etc. |
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Term
| Honest Check for Categorical Data |
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Definition
pitfalls
Simpson's paradox |
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Term
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Definition
| when the distribution of one variable is the same for all categories of another |
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Term
Define:
Simpson's Paradox |
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Definition
when averages are taken across different groups, they can appear to contradict overall averages
"unfair averaging" |
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Term
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Definition
| values of a quantitative variable whose units are known |
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Term
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Definition
1. mode
2. symmetry
3. outliers |
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Term
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Definition
| the highest point in the shape of distribution |
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Term
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Definition
1. bimodal
2. unimodal
3. uniform |
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Term
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Definition
| having one or two modes about the same |
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Term
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Definition
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Term
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Definition
| doesn't appear to have a mode |
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Term
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Definition
| two halves are close to or appear to be mirror images |
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Term
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Definition
1. skewed left
2. skewed right |
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Term
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Definition
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Term
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Definition
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Term
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Definition
| data points that stand away from the body of distribution |
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Term
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Definition
| if outliers only have a small effect on the calculated summary |
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Term
| Visualization of Quantitative Data |
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Definition
Histogram
Split Stem and Leaf Plot |
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Term
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Definition
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Term
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Definition
Range
Quartiles
Standard Deviation |
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Term
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Definition
| maximum value-minimum value=range |
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Term
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Definition
| the medians of the two halves of the data split in half by the overall median |
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Term
Define:
Inter-Quartile Range (IQR) |
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Definition
tells you how much variation there is
Q3-Q1= middle 50% of the data |
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Term
| 4 Integral Parts of Quartiles |
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Definition
Q1
Q3
IQR
Standard Deviation |
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Term
Define:
Standard Deviation |
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Definition
| how far away everything is from the mean |
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Term
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Definition
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Term
Define:
Standardizing Data |
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Definition
| Eliminates units and expresses data in terms of the standard deviation |
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Term
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Definition
adding or subtracting a constant to each value
mean/median may change, but STD and IQR don't |
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Term
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Definition
| Multiplying each data value by a constant |
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