Author Question: Which of the following is true about deseasonalizing data? A) The sum of the seasonal indexes ... (Read 101 times)

jhjkgdfhk · **on:** Jun 24, 2018

Which of the following is true about deseasonalizing data?

A) The sum of the seasonal indexes should be 1.0.
B) The time series is deseasonalized by multiplying each value by its seasonal index.
C) Deseasonalizing a time series reduces autocorrelation.
D) Deseasonalizing a time series can make it easier to see a trend.

Question 2

The Boxer Company has been in business since 1998. The following sales data are recorded by quarter for the years 2010-2012.

Quarter Sales
Winter 10 50
Spring 10 70
Summer 10 100
Fall 10 60
Winter 11 60
Spring 11 70
Summer 11 120
Fall 11 80
Winter 12 70
Spring 12 90
Summer 12 140
Fall 12 100

Which of the following time-series components are present in these data?
A) Trend component
B) Seasonal component
C) Random component
D) All of the above