1.)A model that can be used to make predictions about long term future values of a time series is

a.)linear trend model

b.)quadratic trend model

c.)both a and b

d.) neither a nor b

2.)One application of seasonal indexes is to remove the seasonal variation in a time series. The process is called deseasonalizing, and the result is called a seasonally adjusted time series. true or false?

3.)If summer 2011 sales were $12,600 and the summer seasonal index was 1.20, then the deseasonalized 2011 summer sales value would be:

a.) $12,600

b.) $12,601.2

c.) $15,120

d.) $10,500