The president of State University wants to forecast student enrollments for this academic year based on the following historical data:

What is the forecast for this year using trend-adjusted (double) smoothing with alpha = .05 and beta = .3, if the forecast for last year was 21,000, the forecast for two years ago was 19,000, and the trend estimate for last year's forecast was 1,500?

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Year 5 years ago 4 years ago 3 years ago 2 years ago Last year Enrollments 15,000 16,000 18,000 20,000 21,000