What conditions are necessary in order to use the z-test to test the difference between two population means? Select all the necessary conditions below. A. The samples must be independent. B. Each population has a normal distribution with a known standard deviation. C. The samples must be randomly selected. D. The samples are paired.
Added by Ryan M.
Close
Step 1
The samples must be independent: This is a necessary condition. The two samples being compared should not influence each other. Show more…
Show all steps
Your feedback will help us improve your experience
Sri K and 73 other Intro Stats / AP Statistics educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
In testing the difference between two population means for which the population variances are unknown and not assumed to be equal, two independent samples are drawn from the populations. Which of the following tests is appropriate? a. z-test b. pooled-variances t-test c. unequal variances t-test d. None of these choices.
Lucas F.
To use the $z$ -statistic to test for a difference between the means of two populations, what assumptions must be made about the two samples?
Recommended Textbooks
Elementary Statistics a Step by Step Approach
The Practice of Statistics for AP
Introductory Statistics
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD