1.19 Why should you keep the space? Suppose that you had a data set similar to the one given in Example 1.12, but in which the control values of 66 and 68 were both changed to 64.
(a) Make a stemplot of these data using split stems.
(b) Should you use one stem or two stems for the 60s? Give a reason for your answer. (Hint: How would your choice reveal or conceal a potentially important characteristic of the data?)