The mean of a normal distribution is 400 pounds. The standard deviation is 10 pounds. What is the area between 415 pounds and the mean of 400 pounds?
Click on the arrows to vote for the correct answer
A. B. C. D. E.Explanation
z = (x-u)/sigma. z = 415 - 400/10 = 1.5. From the z-tables, z = 1.5 is 0.4332. Since we are considering just one side of the distribution and the area from the mean, then the area between the points is 0.4332.