Suppose reaction times for recognition of common words like red or green are normally distributed with = 220 milliseconds and = 32. A psychologist presents a sample of n = 16 subjects with words that include names of colors. However, the color names are printed in a different color ink. That is, the word red might be printed in blue ink, or green might be printed in red. For these words, the sample had a mean reaction time of M = 240. a. Do these data indicate that presenting color names in another color alters reaction time? Use a two-tailed test with = .05. b. Compute Cohen's d to measure the size of the treatment effect.