We divided the dataset into train data and test data to try to do the predictions.

Compare the Composite model with Factor model.

Explore the application of eigen value and eigen vectors

We will encounter a lot of trouble when doing the linear regression in reality. This file will give you some suggestion when the nonlinearity and multicollinearity occurred.

We use the actual data to test if there is any difference between 4 types of media.

Set the null hypothesis to find whether the mean of response time in other agency is longer than local one.

To discuss the clusters of customer, the top selling products, and whether there is a seasonality.

To discuss whether there is discrimination against female employees in terms of salary.

There are several difference between uniform distribution and normal distribution. This document will also teach you how to estimate the population mean.