Final answer:
Using the given regression model, the forecast for the number of disk drives to be made next year can be calculated by substituting the appropriate values into the equation. The forecasted sales on day 60 would be approximately 250.1 thousand dollars, and the forecasted sales on day 90 would be approximately 324.5 thousand dollars.
Step-by-step explanation:
To forecast the number of disk drives to be made next year using simple linear regression, we need to use the given regression model. In the model, the equation is ŷ = 101.32 + 2.48x, where ŷ represents the sales in thousands of dollars and x represents the day.
To find the sales on day 60, substitute x = 60 into the equation: ŷ = 101.32 + 2.48(60) = 101.32 + 148.8 = 250.12 thousands of dollars. So, the forecasted sales on day 60 would be approximately 250.1 thousand dollars.
Similarly, to find the sales on day 90, substitute x = 90 into the equation: ŷ = 101.32 + 2.48(90) = 101.32 + 223.2 = 324.52 thousands of dollars. So, the forecasted sales on day 90 would be approximately 324.5 thousand dollars.