In an effort to determine the most effective way to teach safety principles to a group of employees, four different methods were tried. Some employees were given programmed instruction booklets and worked through the course at their own pace. Other employees attended lectures. A third group watched a television presentation, and a fourth group was divided into small discussion groups. A high of 10 was possible. Samples of five tests were selected from each group. The test grade results were: 
Using Excel to assist in determining if all methods generate the same results, what test would be used?
Definitions:
Risk-Free Rate
The theoretical rate of return on an investment with no risk of financial loss, often represented by the yield on government bonds.
Option Contracts
Agreements between two parties granting one the right, but not the obligation, to buy or sell an asset at a pre-agreed price within a specified time frame.
In-The-Money Option
An option with an exercise price that is favorable compared to the current market price of the underlying asset.
Initial Investment
The initial amount of money spent to start a project, purchase an asset, or embark on a financial venture, prior to any earnings or gains.
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