Which of the following is true of a stationary time series?
a. The process generating the data has a variable mean.
b. The variability of the time series is constant over time.
c. The time series plot for this case is a straight line.
d. The fluctuations in values will always exhibit a cyclical pattern.
Question 2
True or False The process flow chart is used to tally frequency counts or record measurements and is a mechanism for entering and retaining data that may be subject to further analysis by another statistical tool.
Indicate whether the statement is true or false