What is the difference between an income statement and a balance sheet?

Income statement includes the revenue and expenses while the balance sheet includes the assets, liabilities and equity, the major factors of the accounting equation.

Using excel how can you find the descriptive statistics for a big sample without having to do one by one?

Using the data analytics tookpak where you will be able to find the mean, maximum, minimum and many other useful information.

How can a Weighted Average Cost of Capital help you define whether or not an investment is worthwhile?

Finding the Wacc can help you define which investment is worth working with because it gives us the rate of debt and equity of the company as well as their weight. These rates will differentiate the different investments and help you define which one to choose from.