Sun or Shade? Karl Niklas and T.G. Owens examined the differences in a particular pl...

Sun or Shade? Karl Niklas and T.G. Owens examined the differences in a particular plant, Plantago Major L., when grown in full sunlight versus shade conditions.16 In this study, shaded plants received direct sunlight for less than 2 hours each day, whereas full-sun plants were never shaded. A partial summary of the data based on = 15 shade plants is shown here:

a. What assumptions are required in order to use the small-sample procedures given in this chapter to compare full-sun versus shade plants? From the summary presented, do you think that any of these assumptions have been violated?

b. Do the data present sufficient evidence to indicate a difference in mean leaf area for full-sun

c. Do the data present sufficient evidence to indicate a difference in mean overlap area for full-sun versus shade plants?