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DATA - Coggle Diagram
DATA
CLASSIFICATION
Statistical perspective
Numerical data
Discrete data
Continuous data
Categorical data
Nominal data
Ordinal data
Way of collecting
Cross-sectional data
Panel data
Time series data
Organized forms
Structured data
Unstructured data
VISUALIZATION TYPES
Comparison
Among categories
Tree map
Heat map
Bar chart
Over time
Line chart
Bubble line chart
Relationship
Scatter plot
Heat map
Distribution
Numerical data
Histogram
Frequency polygon
Categorical data
Tree map
Heat map
Bar chart
Unstructured data
Word Cloud
QUANTILES, DISPERSION, DISTRIBUTION SHAPES
QUANTILES
Quintile
Decile
Quartiles
Percentile
DISPERSION
Variance
Standard deviation = variance^0,5
Range = max - min
MAD
Coefficient of variation
DISTRIBUTION SHAPE
Skewness
Negatively skew: S < 0
Normal distribution: S = 0
Positively skew: S > 0
Kurtosis
Platykurtic: K < 3
Normal distribution: K = 3
Leptokurtic: K > 3
MEASURES OF CENTREAL TENDENCY
Basic concepts
Population
Sample: a part of population
Central tendency
Median: the value of middle data, sorted into descending and ascending order
Mod: the data has the highest frequency
Mean
Geometric mean: return rates, compound rates
Harmotic mean: when buy stocks at other prices (Cost averaging)
Arithmetic mean
Trimmed mean: remove outliers
Winsorized mean: mitigate the effect of outliers
Arithmetic mean: remain outliers
CORRELATION BETWEEN TWO VARIABLES
Covariance: show positive or negative relation between 2 variables
Correlation coefficient: show positive or negative relation and association magnitude between 2 variables