Unit 1 stats
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12 Terms
Marginal relative frequency
Whole table, B/C
Joint relative frequency
Overlap A/C
Conditional relative frequency
1 row or column A/B
Discrete Variable
Countable ex:number of cars or people
Continuous variables
Measurable ex: weight, height, area
Median
Middle number. Use for skewed data. Use in 5 number summary and box plots.
Mean
Average, use if symmetric.
Range
Max subtract min
Describe the distribution
V-variability. Range, IQR, SD
S- Symmetric or skewed, mention gaps
C- center. Median or mean
O- outliers
IQR check
Q3+1.5(IQR) less than max means high outliers
Q1-1.5(IQR) greater than min means low outliers
Cumulative relative frequency
Add the RF in descending order
Z score
Standardized values, SD.( Value-mean)divided by SD
Note 
Flashcards (22)