Xr03-09 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:

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

a. Draw a stem-and-leaf display.

b. Draw a histogram.

c. Describe the histogram.