Gallup poll. The Gallup organization periodically asks the following question:

If your party nominated a generally well-qualified person for president who happened to be a woman, would you vote for that person?

Here is a time series plot of the percentage answering “yes”
versus the year of the (20th) century. The least squares trend line is given by: Year, where 45, . . . 99 to represent the years during which the survey was given.

a) The for this trend line is 94%. A student decided to use this linear model to obtain a forecast for the percent who will respond “yes” in 2012. What value should the student use for Year?

b) Find the predicted value for the year 2012. Is it realistic?

Transcribed Image Text:

90 90 75 75 60 80 % Responding Yes 45 + + + 90 90 45 60 Year 75