Definition 1 of 68
Conclusion drawn from two or more separate crosstabulations that can be reversed when the
data are aggregated into a single crosstabulation
Frequency Distribution
Crosstabulation
Simpson's Paradox
Trendline
Definition 2 of 68
A measure of how large the standard deviation is as compared to the mean.
Coefficient of Variation
Standard Deviation
Variance
Median
Definition 3 of 68
Ranges from -1 to +1.
--> If r = 1 (perfect positive linear relationship), all data would be on a positively sloped line
--> If r = -1 (perfect negative linear relationship), then all the data would be on a negatively
sloped line
**Excel Function: =CORREL(RANGE,RANGE)
Predictive analytics
Crosstabulation
Prescriptive analytics
Correlation Coefficient (r)
,Definition 4 of 68
The set of all data/variables of a statistical analysis.
Community
Sample
Population
Variance
Definition 5 of 68
A tabular summary of data showing the fraction / proportion of observations in each of several
nonoverlapping categories or classes
Relative Frequency
Percent Frequency
Histogram
Frequency Distribution
Definition 6 of 68
Collected from service calls
Big Data
Audio Data
Text Data
Video Data
Definition 7 of 68
Mean is usually < Median
Exponential distribution
Bimodal distribution
Symmetric distribution
Negatively Skewed Distribution (Skewed to the left)
,Definition 8 of 68
A technique of analytics. Yield a best course of action to take - the set of analytic techniques
that yield a course of action. (Eg. optimization models --> generate solutions that maximize /
minimize objective subject to a set of constrains.
Relative frequency
Data mining
Prescriptive analytics
Descriptive statistics
Definition 9 of 68
A bar chart in which each bar is broken into rectangular segments of a different color showing
the relative frequency of each class in a manner similar to a pie chart
Scatter Diagram
Stacked Bar Chart
Histogram
Time Series
Definition 10 of 68
Mean is usually > Median
Positively Skewed Distribution (Skewed to the right)
Population
Uniform distribution
Normally distributed data
, Definition 11 of 68
Q3 - Q1, the rage of the middle 50% of the data
Frequency Distribution
Interquartile Range
Variance
Standard Deviation
Definition 12 of 68
A graphical display of the relationship between 2 quantitative variables
Element
Histogram
Scatter Diagram
Stem-and-leaf Display
Definition 13 of 68
Come from probability and statistics (Including descriptive statistics, data visualization,
probability and probability distributions, sampling, and predictive modeling --> regression
analysis analysis and time series forecasting)
Statistical Inference
Simpson's Paradox
Prescriptive analytics
Techniques in descriptive + predictive analytics
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