A researcher tests a hypothesis that a diet plan affects body weight. Which of the following test statistics should be applied if the population variance is unknown and the sample... A researcher tests a hypothesis that a diet plan affects body weight. Which of the following test statistics should be applied if the population variance is unknown and the sample size is small? A. Z-test B. Chi-square test C. t-test D. F-test

Question image

Understand the Problem

The question is asking which statistical test should be used to determine if a diet plan affects body weight, given that the population variance is unknown and the sample size is small. This indicates a need for knowledge about statistical methods appropriate for small sample sizes with unknown variances.

Answer

t-test

The final answer is C. t-test.

Answer for screen readers

The final answer is C. t-test.

More Information

The t-test is ideal for comparing means when the sample size is small and the population variance is unknown. It is commonly used in hypothesis testing for such conditions.

Tips

Common mistakes include choosing the Z-test, which requires known population variance, or larger sample sizes.

Thank you for voting!
Use Quizgecko on...
Browser
Browser