The amount of time (in seconds) needed to complete a critical task on an assembly line was measured for a sample of 50 assemblies. These data are as follows:

a. Draw a stem-and-leaf display.

b. Draw a histogram.

c. Describe the histogram.

30.3 34.5 31.1 30.9 33.7 31.9 33.1 31.1 30.0 32.7 34.4 30.1 34.6 31.6 32.4 32.8 31.0 30.2 30.2 32.8 31.1 30.7 33.1 34.4 31.0 32.2 30.9 32.1 34.2 30.7 30.7 30.7 30.6 30.2 33.4 36.8 30.2 31.5 30.1 35.7 30.5 30.6 30.2 31.4 30.7 30.6 37.9 30.3 34.1 30.4