Question

Your instructor has just completed building a logistic regression model on a data set with 399 observations. The data set has no missing observations. Let the positive outcomes be denoted by 1 and the negative outcomes be denoted by 0. The following information is known about the model performance: 1. The model predicted 161 positive outcomes. 2. The model correctly predicted 144 positive outcomes. 3. The model correctly predicted 221 negative outcomes. How many subjects who in reality had a negative outcome were predicted by the

Answer 1

The answer is "17"

Explanation:

161 positive results were expected by the model.

Its model predicted 144 positive outcomes correctly.

Its model is thus incorrect to predict (161-144) = 17 positive results.

In other words, the model expected a positive outcome for 17 subjects who had a negative outcome.