If a time series plot exhibits a horizontal pattern, then: a. it ...

[mp14]

If a time series plot exhibits a horizontal pattern, then:
 a. it is evident that the time series is stationary.
  b. the data fluctuates randomly around a variable mean.
  c. there is no relationship between time and the time series variable.
  d. there is no sufficient evidence to conclude that the time series is stationary.

Question 2

True or False If a point is more than 3 sigmas away from the centerline, or if two out of three consecutive points are on the same side of the centerline and more than 2 sigmas away from it, the process is deemed to be in control.
  Indicate whether the statement is true or false

[SVictor]

Answer to Question 1

D

Answer to Question 2

F