The lower graph shows the beta curve
corresponding to a hypotheses test where *H*_{0}:
μ=1 is tested against *H*_{1}:
μ≠1.
The upper graph shows the distribution of the sample means for a
given population mean. The two red lines in this graphs shows the
lower and upper critical values, i.e., when the sample mean is
between these two lines we fail to reject *H*_{0}.
The blue line shows the location of the population mean. The height
of the beta curve at a given population mean (location of the blue
line) is equal to the area between the two red lines (the probability
of failing to reject *H*_{0} when *H*_{0}
is false).