To estimate the ratio of the population variances you use the ____________________ of the ...

To estimate the ratio of the population variances you use the ____________________ of the ____________________ variances.
 Fill in the blank(s) with correct word

Q. 2

The fairly regular fluctuations that occur within each year would be contained in which component of the time series?
 a. Long-term trend c. Seasonal variation
  b. Cyclical variation d. Random variation

Q. 3

The sampling distribution of the ratio of two sample variances is said to be F-distributed provided that:
 a. the samples are independent from any distributions.
  b. the populations are normal with equal variances.
  c. the samples are matched and their sizes are large.
  d. the samples are independently drawn from two normal populations.

Q. 4

The overall upward or downward pattern of the data in an annual time series will be contained in which component of the time series?
 a. Long-term trend c. Seasonal variation
  b. Cyclical variation d. Random variation