Question

A statistical model predicts that there is a strong correlation between a student's hours spent studying and their performance on an exam. Explain how you would evaluate the validity of this model.

Answer 1

To evaluate the validity of the statistical model, collect data, calculate correlation coefficient, check for significance, and consider other factors.

Step-by-step explanation:

By following the given steps, you can evaluate the validity of the model and determine if there is indeed a strong correlation between hours spent studying and exam performance.

1. Collect data: Gather information on the number of hours students spend studying and their corresponding exam grades.
2. Calculate correlation coefficient: Use a statistical method, such as Pearson's correlation coefficient, to measure the strength and direction of the relationship between the two variables.
3. Check for significance: Determine if the correlation coefficient is statistically significant, indicating that the relationship is unlikely to have occurred by chance.
4. Consider other factors: Take into account any confounding variables or alternative explanations for the observed correlation.