7. The following data give the total cholesterol level (HDL + LDL + 20% of triglycerides)

of 20 Americans between the ages of 30 and 40 years. Use the sign test to test the hypothesis at the 5% level of significance that the median cholesterol of American males in that age group is 150 mg/dL.

604 14 Nonparametric Tests 164 180 151 131 130 154 140 137 141 145 176 145 173 141 173 166 141 130 133 144