38. Population growth 2010 This "back-to-back" stem-and- leaf plot displays two data sets at once-one going to the left, one to the right. The plot compares the percent change in population for two regions of the United States (based on census figures for 2000 and 2010): The fastest growing state was Nevada at 35%. To show the distributions better, this display breaks each stem into two-lines, putting leaves 0-4 on one stem and leaves 5-9 on the other. NE/MW States S/W States 4433332200 134 987777666555 0 7799 1 0023344 1 57889 2 1 Population Growth rate (21710 means 12% for a NE/NW state and 10% for a S/W state). a) Use the data displayed in the stem-and-leaf display to construct comparative boxplots. b) Write a few sentences describing the difference in growth rates for the two regions of the United States. 39. Ozone Ozone levels (in parts per billion, ppb) were re- corded at sites in New Jersey monthly between 1926 and 1971. Here are boxplots of the data for each month (over the 46 years), lined up in order (January = 1): Ozone [ppb) 350 HOH 300 180-1 1 2 3 4 5 6 7 8 9 10 11 12 Month a) In what month was the highest ozone level ever recorded? b) Which month has the largest IQR? c) Which month has the smallest range? d) Write a brief comparison of the ozone levels in January and June. e) Write a report on the annual patterns you see in the ozone levels