1. Data Presentation and Descriptive Statistics
Petr V. Nazarov, LIH
2021-02-19
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Materials: Presentation |
Data and statistic
- elements, variables and observation
- types of data (qualitative and quantitative) and scales (nominal, ordinal, interval, ratio)
Descriptive statistics: tabular and graphical presentation
- frequency distribution
- pie, bar chart and histogram representation
- crosstabulation (pivot tables) and scatter diagram
Descriptive statistics: numerical measures
- measures of location: mean, mode, median, quantiles/quartiles/percentiles
- measure of variability: variance, standard deviation, IQR, MAD, coefficient of variation
- other measures: skewness of distribution
- covariance and correlation coefficient
- interpretation of correlation coefficient
- z-score. Chebyshev’s theorem. Detection of outliers.
