Suppose the first row of 12 observations in Exercise 110 came from solder connections made at station 105 and the second row came from station 107. Use a pair of stem-and-leaf diagrams to determine whether you should suspect a difference in the soldering process at the two stations.
Exercise 110
The following are the percentages of tin in measurements made on 24 solder joints:
(a) Construct a stem-and-leaf diagram using 5 and 6 as the stem labels.
(b) Construct a double-stem display.
(c) Which is more informative?