The following time plot shows the values of two indices of the economy in the United States:
Question:
(a) From the chart, do you think that the two sequences are associated?
(b) The scatterplot shown above displays the same time series, with consumer sentiment plotted versus inflation. Does this scatterplot change your impression of the association between the two?
(c) Visually estimate the correlation between these two series.
(d) For looking at the relationship between two time series, what are the advantages of these two plots? Each shows some things, but hides others. Which helps you visually estimate the correlation? Which tells you the timing of the extreme lows and highs of each series?
(e) Does either plot prove that inflation causes changes in consumer sentiment?
Step by Step Answer:
Statistics For Business Decision Making And Analysis
ISBN: 9780321890269
2nd Edition
Authors: Robert Stine, Dean Foster