We use a t-test to determine whether two population variances are ...

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We use a t-test to determine whether two population variances are equal.
  Indicate whether the statement is true or false

Question 2

In exponentially smoothed time series, the smoothing constant w is chosen on the basis of how much smoothing is required. In general, which of the following statements is true?
 a. A small value of w such as w = 0.1 results in very little smoothing, while a large value such as w = 0.8 results in too much smoothing
  b. A small value of w such as w = 0.1 results in too much smoothing, which a large value such as w = 0.8 results in very little smoothing
  c. A small value of w such as w = 0.1 and a large value such as w = 0.8 may both result in very little smoothing
  d. A small value of w such as w = 0.1 and a large value such as w = 0.8 may both result in too much smoothing

[Jane]

Answer to Question 1

F

Answer to Question 2

B