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Interview Question: Differentiate between univariate, bivariate and multivariate analysis
Statistical analysis is the science of collecting, exploring and presenting large amounts of data to discover underlying patterns and trends.
The cycle of statistical analysis is to:-
- Summarise the data, perhaps in a chart.
- Find key measures, such as the mean.
- Calculate the measures of spread, such as the standard deviation.
- Make future predictions on the data based on past behaviour.
- Test an experiment’s hypothesis, such as hypothesis testing, where the null hypothesis is either proved or disproved.
There are several types of statistical analysis, such as univariate, bivariate and multivariate.
Univariate Analysis
Univariate analysis is perhaps the simplest form of statistical analysis, as only one variable is analysed.
The below example is a scatter plot of one column of the Iris dataset:-
Bivariate analysis
