Periodically, a sample of 20 items are randomly selected from a population that is normally distributed, the average is computed, and plotted. Which of the following statements is correct?
I. The average of the logarithms of the values is lognormally distributed.
II. The standard deviation of the averages is equal to the standard deviation of the individuals divided by the square root of 20.
III. The variance of the averages is equal to the variance of the individuals divided by the square root of 20.

A normal (Gaussian) distribution curve is

A company is planning to completely change its employee performance, appraisal and reward system. Which of the following is NOT viable for consideration in the new system?

What is the key ranking difference between the Deming philosophy and the Malcolm Baldrige award criteria?

Which of the following nondestructive testing methods can be used to evaluate sub-surface discontinuities in aluminum bar stock?
. Microwave.
. Magnetic particle.
. Pulse echo.
. Eddy current.