OpenStax, Introductory Statistics 2e §12.5 Prediction · Exercise 2 · Statistics · Regression & correlation
Prediction · 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 follows:
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, Introductory Statistics 2e · §12.5 Prediction · Exercise 2
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