
Chapter 10
340
FIGURE 10.14
Minitab One-Sample
Z for the Mean dialog
box
FIGURE 10.15
Minitab One-Sample
Z: Options dialog box
standard deviation is known, it can be typed in the Sigma text box. Otherwise sample standard
deviation can be used for computation (Figure 10.13).
After placing all the values in the Function Arguments dialog box, click OK. The output shows
the right-tailed p value for the test statistic. If the z value is negative, we can subtract (1– Excel
Output) to obtain the p value for the left-tail. The p value computed by Excel is only for a one-tailed
test. For a two-tailed test, this p value should be doubled and should be compared ...