cheaterman9926 cheaterman9926

24-05-2024
Mathematics

contestada

Using the data in RDCHEM.RAW, the following equation was obtained by OLS:

rdintens = 2.613 +.00030 sales - .0000000070 sales²
(.429) (.00014) (0000000037)
n 32, R² = .1484.

At what point does the marginal effect of sales on rdintens become negative?

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