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Then, we reject H
0
: µ = 150, against H
1
: µ ≠ 150.  The test z value is  
z
0
 = 5.656854.  The P-value is 1.54×10
-8
.  The critical values of  
±z
α/2
 = ±1.959964, corresponding to critical ⎯x range of {147.2 152.8}.
This information can be observed graphically by pressing the soft-menu key 
@GRAPH:
Reference
Additional materials on statistical analysis, including definitions of 
concepts, and advanced statistical applications, are available in Chapter 
18 in the user’s guide.
SG49A.book  Page 11  Friday, September 16, 2005  1:31 PM