Use the given information to find the minimum sample size required to estimate an unknown population mean μ. How many women must be randomly selected to estimate the mean weight of women in one age group. We want 90% confidence that the sample mean is within 2.1 lb of the population mean, and the population standard deviation is known to be 19 lb
Added by Ana S.
Step 1
1 lb - Population standard deviation (σ) = 19 lb - Confidence level = 90% - Critical value (Z) for 90% confidence level = 1.645 Show more…
Show all steps
Close
Your feedback will help us improve your experience
Qudsiya Anis and 72 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
How many women must be randomly selected to estimate the mean weight of women in one age group. We want 90% confidence that the sample mean is within 2.1 lb of the population mean, and the population standard deviation is known to be 19 lb. Please show work.
Christopher D.
How many women must be randomly selected to estimate the mean weight of women in one age group. We want 90% confidence that the sample mean is within 2.3lb of the population mean, and the population standard deviation is known to be 14 lb. 143 202 126 101
Sri K.
Using the simple random sample of weights of women from a data set, we obtain these sample statistics: n=40 and x overbar=142.62 lb. Research from other sources suggests that the population of weights of women has a standard deviation given by sigma σ=32.9932.99lb. a. Find the best point estimate of the mean weight of all women. b. Find a 90% confidence interval estimate of the mean weight of all women.
Robin C.
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