A friend comes to you with the following problem. "I provided my boss with a cost equation using regression analysis. He was unhappy with the results. He told me to do more work and not return until I had a lower cost estimate for one of the variables - the number of machine-hours. My initial analysis covered the last 36 months. By dropping four months in whic the relation between costs machine-hours was very high, I was able to get a lower cost estimate for machine-hours. My boss was happy with my new results. Do you think that what I did was unethical?" How would you respond?