Histogram: Proportion of blue cells in 50% detergent treatment 18 16 14 12 10 Frequency 0 10 20 OE 40 50 60 70 80 90 100 More Bin a. Comment on the histogram. Is this distribution what you would expect? Why or why not? (If it is oddly shaped, what did you expect it to look like?) Given that the Mean: 46.05 SD:20.24 b. Highlight the bar that contains the mean. (Use an arrow or a 'marker' on the screencap). c. Show on the histogram where one standard deviation (above and below the mean) would fall. (arrow or markers) d.Calculate the z-score for your 50% treatment. (1 mark). Comment on what your z-score means