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Science
Computer Science
Computer Graphics
ISYS exam:(
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Terms in this set (28)
Define analytics
scientific process of transforming data into insight for making better decisions
Define Descriptive analytics
Reviewing and examining data to understand the data, analyze business performance
Define diagnostic analytics
What happened and why
Predictive analytics
Analyze current and historical data to determine what is most likely to (not) happen
Prescriptive analytics
Develop and analyze alternatives that can become courses of action
VVV
Velocity, Volume, Variety
What are the values of big data?
Actionable insight.
It is granular- can be used to create personalized experiences
Statistics
Can refer to the art and science of collecting, analyzing, presenting, and interpreting data
Qualitative/ categorical data
Labels or names used to identify attribute of element
Numeric or nonnumeric
Appropriate statistical analyses are limited
Categorical data
Nominal or ordinal
Quantitative Data
Interval or ratio
Quantitative data
How much or how many
Ordinary arithmetic operations are meaningful
Time-series data
Data collected over several periods of time
Cross Sectional Data
Data collected at the same or approximately the same point in time.
Statistical Studies-Observational
No attempt to control variables
Statistical studies-Experimental
the variable of interest is first identified. Then one or more other variables
are identified and controlled so that data can be
obtained about how they influence the variable of
interest.
Statistical Inference
Process of using data obtained from sample to make estimates and test hypothesis about characteristics of population
Best way to summarize categorical data
Bar or pie charts
Best way to summarize quantitative data
Frequency distribution, histograms
Relative frequency distribution
Frequency/total
Appropriate Class Width
Largest data value-Smallest data value/ # of classes
Mean
sum of values/ Number of observations
Percentile
(p/100)(n+1)
Measures of Location
Mean, Median, Mode, Percentile, Quartiles
Variance Equation (Sample)
Variance Equation (Population)
Standard Deviation
the square root of the variance
2 descriptive measures of relationship between 2 variables are
Covariance and correlation coefficient
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