Questions

A. All seniors and juniors received a survey regarding the upcoming prom. B. A researcher randomly selects several books from the library catalog to count relative frequency of letters. C. A clinic randomly assigns it’s patients willing to participate in the study to either a new treatment or placebo. D. Quality control team removes 20 parts located at the end of the conveyor belt and randomly assigns them either to the stress or temperature test.

I believe the correct answer is B. We are looking at the relative frequency of letters, and you are choosing a random sample of books to count it.
With respect to a random sample, we sample from a population. We like to randomly select a sample from a population. Thank you.


Answered 2 years ago

Unlock Startups Unlimited

Access 20,000+ Startup Experts, 650+ masterclass videos, 1,000+ in-depth guides, and all the software tools you need to launch and grow quickly.

Already a member? Sign in

Copyright © 2020 Startups.com LLC. All rights reserved.