In his geography class, Juan makes a conjecture that more people live in cities that are warm (above 50°F) in the winter than live in cities that are cold (below 32°F). In order to test his conjecture, he collects the mean temperatures for January of the 25 largest U.S. cities. These cities contained about 12% of the U.S. population in 2000.
a. Construct a box plot of these data.
b. List the five-number summary.
c. What are the range and the interquartile range for these data?
d. Do the data support Juan's conjecture? Explain your reasoning.

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31.8°, 56.0, 21.4°, 51.4°, 31.20, 52.30, 56.8°, 44.0° 50.4°, 23.4°, 26.0°, 48.5° 53.20, 27.1, 49.1°, 32.7°, 39.60, 18.. 29.6, 35.20 37.1o, 44.2, 39.1°, 29.5°, 40.5°