A. The stemplot with splitting the stems would be preferable, as it provides more detail about the data. The stemplot would look like this:
Stem | Leaves
6 | 0, 8, 8
7 | 0, 0, 4, 6, 8, 8, 8, 8, 9
8 | 0, 0, 1, 1, 2, 5, 6, 8, 8, 9
9 | 5, 7
B. The shape of the distribution is slightly skewed to the left, with a center around 800 millimeters and a spread between 600 and 950 millimeters.
C. El Nino appears to have a negative effect on monsoon rains, as the average monsoon rainfall for El Nino years is lower than the average monsoon rainfall for all years.
Here are the monsoon rains (in millimeters) for the 23 strong El Nino years between 1871 and 2004:
628 669 740 651 710 717 698 653 604 781 784 790 811 830 858 896
806 790 792 957 872
a. To make the stemplot of these rainfall amounts, round the data to the nearest 10, so that are hundress of millimeters and leaves are tens of millimeters. Make 2 stemplots, with and without splitting the stems. Which plot so you prefer?
b. Describe the shape, center, and spread of the distribution.
c. The average monsoon rainfall for all years form 1871 to 2004 is about 850 millimeters. What effect does El Nino appear to have on monsoon rains?
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