male ---- greater than 40 - 170 mg/dl
female -----greater than 35 - 135 mg/dl
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It is the "set point."
The Z value is 0.
z=(x-mu)/s = (-10+9)/2 z = -1/2 Note that the standard normal has a mean of 0, therefore: The value of -10 is to the left of the mean of -9 The value of -1/2 is to the left of the mean of 0.
z = ±0.44
A half.