EMC Proven Professional – Data Science and Big Data Analytics — Question 21

What is an example of a null hypothesis?

Answer options

• A. that a newly created model does not provide better predictions than the currently existing model
• B. that a newly created model provides a prediction of a null sample mean
• C. that a newly created model provides a prediction of a null population mean
• D. that a newly created model provides a prediction that will be well fit to the null distribution

Correct answer: A

Explanation

The correct answer, A, represents a null hypothesis by stating there is no significant difference in predictive performance between the new and existing models. Options B, C, and D do not accurately define a null hypothesis as they focus on predictions related to sample or population means, rather than comparing the effectiveness of two models.