Author Question: If some natural relationship exists between each pair of observations that provides a logical reason ... (Read 87 times)

rachel9 · **on:** Jun 24, 2018

If some natural relationship exists between each pair of observations that provides a logical reason to compare the first observation of sample 1 with the first observation of sample 2, the second observation of sample 1 with the second observation of sample 2, and so on, the samples are referred to as:
a. matched pairs.
b. independent samples.
c. nonrandom samples.
d. None of these choices.

Question 2

The time series component that reflects the irregular changes in a time series that are not caused by any other component, and tends to hide the existence of the other more predictable components, is called:
a. long-term trend c. seasonal variation
b. cyclical variation d. random variation