View the step-by-step solution to:

A research group wants to estimate the percent of consumers who plan to buy a new cell phone in the next three month. What is the required sample...

A research group wants to estimate the percent of consumers who plan to buy a new cell phone in the next three month. What is the required sample size for a sampling error no more than .04 and a confidence level of 95%?





Many Americans work at home or in the weekends in addition to their work hours. If you want to estimate the mean weekend work hours with a 5 minutes margin of error, how many workers would you sample? Assume sigma=10 minutes. Use a .10 significance level (90% confidence)

Top Answer

On these questions, we are required to find out the sample sizes. Note the below formula and parameters employed. For 90% CI,... View the full answer

Sign up to view the full answer

Other Answers

First Question Since they want to estimate the percentage, it mean that the proportion is not know. When p is... View the full answer

THESE ARE MY... View the full answer

Why Join Course Hero?

Course Hero has all the homework and study help you need to succeed! We’ve got course-specific notes, study guides, and practice tests along with expert tutors.

-

Educational Resources
  • -

    Study Documents

    Find the best study resources around, tagged to your specific courses. Share your own to gain free Course Hero access.

    Browse Documents
  • -

    Question & Answers

    Get one-on-one homework help from our expert tutors—available online 24/7. Ask your own questions or browse existing Q&A threads. Satisfaction guaranteed!

    Ask a Question
Ask a homework question - tutors are online