A health insurance company is interested in the cholesterol levels for individuals ages 40 or older. A random sample of 100 individuals was chosen from the target population. The following information was obtained from the sample: mean = 158 mg, median = 159 mg, standard deviation = 20 mg. One individual has a cholesterol level at 175 mg. Based on only the summary statistics, is this an unusually high level of cholesterol for someone from this population? Why or why not?