OpenStax, Statistics §12.4 Prediction (Optional) · Exercise 2 · Statistics · Regression & correlation
Prediction (Optional) · Exercise 2
An electronics retailer used regression to find a simple model to predict sales growth in the first quarter of the new year (January through March). The model is good for 90 days, where x is the day. The model can be written as ŷ = 101.32 + 2.48x, where ŷ is in thousands of dollars.
What would you predict the sales to be on day 90?
Its source prints no answer for this problem, so there's nothing to check against.
OpenStax, Statistics · §12.4 Prediction (Optional) · Exercise 2
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