StatisticsdrillAdjusted R squared
A statistics problem from Statisticsdrill. Solve it with one answer box, with a fresh sample on every attempt and the worked steps and spreadsheet function in the answer, and it is checked the moment you submit.
The task
A multiple regression with 4 predictors, fitted to 49 observations, has R² = 0.73. What is the adjusted R²? Round to 3 decimal places.
What this problem teaches
R² never falls when a predictor is added. Adjusted R² charges for each predictor, so it only rises when the new one earns its place.
A hint if you get stuck
Adjusted R² = 1 - (1 - R²)(n - 1) / (n - k - 1), where k is the number of predictors, not counting the intercept.
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