Topic 19: Learning About a Mean Using Continuous Models

Minitab Local Macro normal

Summarizes normal distribution for a mean.

TO RUN:

Suppose 100 and 5 are the numbers (mean and standard deviation) of the normal curve that represents your beliefs about a population mean M. Put in column C1 the values for which you wish to compute "less than" probabilities. In column C2, put the probability values for which you wish to compute percentiles. To compute the "less than" probabilities and the percentiles, type the following command in the Minitab Session Window. The graph of the normal curve is produced as part of the output.

MTB > %normal 100 5;

SUBC> cprob c1;

SUBC> quan c2.

Executing from file: normal.MAC

Plot density * x

Row M PROB_LT

1 90 0.022750

2 95 0.158655

3 100 0.500000

4 105 0.841345

5 110 0.977250

Row PROB QUANTILE

1 0.05 91.776

2 0.25 96.628

3 0.50 100.000

4 0.75 103.372

5 0.95 108.224