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Item 11
MODELING REAL LIFE The stem-and-leaf plot shows the number of confirmed cases of a virus in 15 countries.

A stem and leaf plot. A vertical line separates each stem from its first leaf. The first row has a stem of 4 and leaves 1, 1, 3, 3, and 5. The second row has a stem of 5 and leaves 0, 2, 3, and 4. The third row has a stem of 6 and leaves 2, 3, 3, and 7. The fourth row has a stem of 7 and leaf 5. The fifth row has a stem of 8 and no leaves. The sixth row has a stem of 9 and leaf 7. The key shows 5 vertical bar 0 is equal to 50 cases.

Find the mean, median, mode, range, and interquartile range of the data. Round your answers to the nearest tenth, if necessary.

The mean is
.

The median is
.

The modes from least to greatest are
,
, and
.

The range is
.