Construct a stem-and-leaf display for the hours that 20 students spent studying for a marketing test. 3.5   2.8   4.5   6.2   4.8   2.3   2.6   3.9   4.4   5.55.2   6.7   3.0   2.4   5.0   3.6   2.9   1.0   2.8   3.6

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