Question 90:

Asked on February 23, 2008

1

Answer:

No answer provided yet.Use the Interactive graph of the standard normal curve. Since you want to know just the percent above 200, you’d use the one-tailed area (the second graph). Enter the mean (160) and standard deviation (30) in the boxes on the graph and hover over the graph until the x-value reaches 200, which is right around 1.34 standard deviations above the mean. You’ll then see that the area above this point (the white area) is around 8.98%. Or a little less than 9% of the population would have cholesterol above 200.