A biology student is studying the effects of two different nutrient agars in which to promote the growth of bacteria in a Petri dish. After 2 days, the student counted the number of colonies for each of the 15 dishes for each agar type (A and B). The data are listed below. A 6 5 3 11 7 10 13 8 11 7 11 g 12 7 B 13 15 13 12 12 10 10 16 The student then created the histogram shown below to compare the two agars. 0.35 0.30 0.25 Relative Frequency Agar A 0.20 0.15 0.10 0.05 0.00 2 4 6 8 10 12 14 16 0.35 0.30 0.25 Agar B Relative Frequency 0.20 0.15 0.10 0.05 0.00 2 4 6 8 10 12 14 16 A (a) Which of the following is the best comparison of the shapes of the distributions? The distribution for A appears to be left skewed, and the distribution for B appears to be right skewed. O Both distributions appear to be slightly left skewed. O Both distributions appear to be slightly right skewed. The distribution for A appears to be right skewed, and the distribution for B appears to be left skewed. (b) Which of the following is NOT true concerning the spread of the distributions? The distribution for A has a smaller interquartile range than the distribution for B. O The distribution for A has a smaller range than the distribution for B. The distribution for A has more variability than the distribution for B. The distribution for A has a smaller standard deviation than the distribution for B