**Blood Chemistry**

In pharmacologic research a variety of clinical chemistry

measurements are routinely monitored closely for evidence

of side effects of the medication under study. Suppose

typical blood-glucose levels are normally distributed, with

mean = 90 mg/dL and standard deviation = 38 mg/dL.

**5.31 **If the normal range is 65−120 mg/dL, then what percentage

of values will fall in the normal range?

**5.32 **In some studies only values at least 1.5 times as high

as the upper limit of normal are identified as abnormal. What

percentage of values would fall in this range?

**5.33 **Answer Problem 5.32 for values 2.0 times the upper

limit of normal.

**5.34 **Frequently, tests that yield abnormal results are repeated

for confirmation. What is the probability that for a

normal person a test will be at least 1.5 times as high as the

upper limit of normal on two separate occasions?

**5.35 **Suppose that in a pharmacologic study involving 6000

patients, 75 patients have blood-glucose levels at least 1.5

times the upper limit of normal on one occasion. What is the

probability that this result could be due to chance?