Suppose a plant that produces dye wants to test the process. Four samples are randomly selected from the production process and each analyzed for its color intensity. The data are collected over a ten-day period. Assume the population of color intensity is normally distributed with a mean of 5 and a standard deviation of 1.1 . What would be the upper control limit for a chart of this study?
a. 6.65
b. 6.04
c. 8.3
d. 8.63
Question 2
In investment models, a useful approach for generating future returns and inflation factors from historical data is:
a. the NPV approach
b. the scenario approach
c. the averaging approach
d. the trend analysis approach
e. none of these choices