A researcher was interested in how many hours on average ER doctors sleep per week. He collected data from ER doctors at a local hospital and obtained the following results: 59, 32, 34, 51, 40, 52, 60, 61, 40, 43, 30, 31, 31, 44, 42. Make a grouped frequency table using intervals from 30-34, 35-39, etc., and then make a histogram based on the grouped frequency table. How would you describe the distribution? - Bimodal -Normal -Rectangular -Unimodal