Suppose heights of adults (measured in inches) are normally distributed with mean 70 inches and standard deviation 10 inches. What can be said about an adult height of 100 inches?
a. It is not an outlier because the height is medically plausible.
b. It is not an outlier because you are not told that it is an error in the measurement process.
c. It is an outlier because it is above 1 standard deviation of the mean.
d. It is an outlier because it is above 3 standard deviations of the mean.