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Multiple Regression: Predictors of Employee Performance
Interprets R regression output with mixed significance predictors, explaining which variables matter, calculating adjusted R², and providing APA-formatted results with appropriate causal language caveats.
Input
What you provide to the skill
Multiple regression performance prediction (n=100): experience B=1.35 SE=0.39 p=.0009, education B=-0.23 p=.709, absenteeism B=-2.89 SE=0.71 p=.0001, salary B=0.0045 p=.035. R²=.5623, Adj-R²=.5421, F(4,95)=27.84 p<.001. Interpret predictors, provide APA format
Output
What the skill generates for you
Interpretation
Test Type: Multiple Linear Regression
Purpose: Predicting employee performance from experience, education years, absenteeism, and salary
Sample Size: n = 100 (95 residual df + 4 predictors + 1)
Overall Model Fit
- F(4, 95) = 27.84, p < .001
- Model is significant: predictors collectively explain performance
- Adjusted R² = .54 (report this, not multiple R²)
- Interpretation: 54% of variance explained (large effect)
Individual Predictors
Experience: B = 1.35, SE = 0.39, t(95) = 3.46, p < .001
- Significant positive predictor
- Each additional year of experience → 1.35 point increase in performance
Education Years: B = -0.23, SE = 0.62, t(95) = -0.38, p = .709
- Not significant (p > .05)
- No relationship with performance after controlling for other variables
Absenteeism: B = -2.89, SE = 0.71, t(95) = -4.06, p < .001
- Significant negative predictor
- Each additional absence → 2.89 point decrease in performance
Salary: B = 0.0045, SE = 0.0021, t(95) = 2.14, p = .035
- Significant positive predictor
- Each $1,000 increase in salary → 4.5 point increase in performance
APA-Formatted Results
“A multiple linear regression was conducted to predict employee performance from experience, education years, absenteeism, and salary. The overall model was significant, F(4, 95) = 27.84, p < .001, adjusted R² = .54. Experience (B = 1.35, SE = 0.39, t = 3.46, p < .001), absenteeism (B = -2.89, SE = 0.71, t = -4.06, p < .001), and salary (B = 0.0045, SE = 0.0021, t = 2.14, p = .035) were significant predictors. Experience and salary positively predicted performance, while absenteeism negatively predicted performance. Education years was not a significant predictor (B = -0.23, SE = 0.62, t = -0.38, p = .709).”
What NOT to Report
- Residuals (diagnostic information)
- Residual standard error
- Significance stars (report exact p-values)
- Multiple R-squared (use adjusted)
- Intercept interpretation (35.21 has no meaningful context)
Common Mistakes to Avoid
- Confusing R² with correlation coefficient r
- Interpreting non-significant predictors (education) as meaningful
- Claiming causation from regression (association only)
- Forgetting standard errors when reporting coefficients
- Reporting multiple R² instead of adjusted R²
- Omitting direction of relationships (positive/negative)
About This Skill
Interpret statistical output from SPSS, R, Python, or Stata. Explains each statistic in plain language, generates APA-formatted results, and calculates missing effect sizes.
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