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

[londonang]

If a time series plot exhibits a horizontal pattern, then
 a. it is evident that the time series is stationary.
  b. the data fluctuates around the variable mean.
  c. there is no relationship between time and the time series variable.
  d. there is still not enough evidence to conclude that the time series is stationary.

Question 2

A two-dimensional graph representing the data using different shades of color to indicate magnitude is called a
 a. heat map. b. bubble chart.
  c. column chart. d. pie chart.

[xoxo123]

Answer to Question 1

d
RATIONALE: A time series plot for a stationary time series will always exhibit a horizontal pattern with random fluctuations. However, simply observing a horizontal pattern is not sufficient evidence to conclude that the time series is stationary.

Answer to Question 2

a
RATIONALE: A heat map is a two-dimensional graphical representation of data that uses different shades of color to indicate magnitude. Heat maps depend strongly on the use of color to convey information over different areas, across time, or both.

[londonang]

Excellent

[bimper21]

Gracias!