Mathematics for Data Analysis – Part 2

2. Chi-Squared Test
The Chi-Squared Test of Association allows the comparison of two attributes (i.e. qualitative variables) in a sample of data to determine if there is any relationship between them.
The idea behind this test is to compare the observed frequencies with the frequencies that would be expected if the null hypothesis of no association / [...]

Mathematics for Data Analysis – Part 1

1. Basic Statistics
Statistics helps in collecting, classifying and interpreting data that conveys information.
Simple statistical measures to perform the fundamental analysis are: the mean (what is the data average?), the median (data point that splits the total data into 2 equal parts ), the mode (the variable value with highest frequency), the variance (the spread of [...]