Problem
From a data set make an end-to-end program using a main function and multiple functions.
[NOT USING pandas]
A. Read the dataset from a csv file.
B. Data preparation:
a. Identify and replace the outlier values.
b. Identify and replace the null values.
C. Interpret the dataset using the statistics metrics.
D. Provide a set of plots presenting pair-wise correlation for variables/columns.
E. Provide a pairwise correlation between variables using the Pearson correlation formula.