Unless we can conclude that the population variances are equal, ...

[Chelseaamend]

Unless we can conclude that the population variances are equal, we cannot use the pooled variance estimate.
  Indicate whether the statement is true or false

Question 2

A trend is one of the four different components of a time series. It is a long-term, relatively smooth pattern or direction exhibited by a series, and its duration is more than one year.
  Indicate whether the statement is true or false

[Anna]

Answer to Question 1

T

Answer to Question 2

T