Typically when researching a business or academic issue, you would ask a question about something and form a hypothesis. You would then collect the data and test it to see if the null hypothesis (no difference) is supported or refuted. Then you would present the findings.

• Describe what you are comparing.
• State your hypothesis in a sentence.
• Indicate the appropriate t-test that you will use to evaluate your hypothesis.
• State the alpha (?) level.

Compare two different companies g compare one company vs ACME error before and after Brand X error before and after Hypothesized mean maintenance maintenance 0 5 4 9 6 9 9 4 2 6 6 3 6 5 7 5 3 2 6 5 * Note - Error (distance from zero} achieved by converting data to absolute values