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When adding patient age as a second predictor in a regression model for surgical duration, what does an increase in adjusted R-squared indicate?

Which of the following methods adjusts for publication bias in meta-analysis?

In a study of preoperative hemoglobin levels and postoperative recovery time, the y-intercept of the regression line represents:

A nurse anesthetist is analyzing the relationship between patient weight (kg) and required propofol dose (mg) using the regression equation: Dose=2.5×Weight+50Predict the propofol dose for a patient weighing 80 kg. Enter a whole number only.

In a regression model for predicting extubation time, which assumption must hold true for residuals?

If a nurse anesthetist uses a regression model to predict fluid requirements based on patient weight, what does a significant p-value for weight indicate?

Multicollinearity in a logistic regression model can:

Given the following data:Observed agreement (Po) = 0.72Expected agreement (Pe) = 0.50Calculate Cohen’s kappa (K). K= (Po−Pe) / (1 – Pe)

In a study predicting postoperative nausea and vomiting (PONV) based on anesthesia type and duration, how would you include anesthesia type (categorical variable) in the regression model?

A systematic review finds a pooled odds ratio of 1.8 (95% CI: 1.2–2.6) for the likelihood of successful intubation using video laryngoscopy compared to direct laryngoscopy. What does this indicate?