Question 12.47

image 47. Challenge Exercise: The professionals versus the Darts. Try to answer these questions without redoing the calculations and without rerunning the ANOVA. Refer to Exercise 32. What if we added three points to each value for the DJIA? (Hint: The sample mean for the DJIA is more than three points lower than the other two sample means.)

  1. How would that change affect each entry in the ANOVA table?
  2. How would that change affect the conclusion, if at all?

12.1.47

(a) (i) and would stay the same (ii) would increase (iii) SSTR would decrease (iv) SSE would stay the same (v) SST would decrease (vi) MSTR would decrease (vii) MSE would stay the same (viii) would decrease (ix) the would increase. (b) would decrease and the would increase. Therefore, the conclusion would still be do not reject .