Assume that the margin of error is 3.29 lb and the population standard deviation is known to be 20 lb. How many students must be randomly selected to estimate the mean weight of students in one age group using a 90% confidence level?
Added by Rebecca D.
Step 1
We know the margin of error (E) is 3.29 lb. Show more…
Show all steps
Close
Your feedback will help us improve your experience
Prabhakar Kumar and 83 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
Suppose a new 90% confidence interval was desired to estimate the mean bookbag weight for all college students. What minimum sample size would be needed to have a margin of error of at most 1? The standard deviation is 2.47.
Prabhakar K.
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