A sample mean, sample size, population standard deviation, and confidence level are provided. Use this information to complete parts a) below. x overbarxequals=2121, nequals=3232, sigmaσequals=33, confidence levelequals=9595% a) Use the one-mean z-interval procedure to find a confidence interval for the mean of the population from which the sample was drawn.
- print Print
- list Cite
Expert Answers
Eric Bizzell
| Certified Educator
briefcaseTeacher (K-12)
calendarEducator since 2011
write3,077 answers
starTop subjects are Math, Science, and Business
We are asked to find the confidence level of the mean of the population that a sample was drawn from. The data from the sample is `bar(x)=21, n=32, sigma=3` with a 95% confidence (`alpha=.05` )
Since we know the standard deviation of the population we use the standard normal table (`z-` table.)
The confidence interval...
(The entire section contains 171 words.)
Unlock This Answer Now
Start your 48-hour free trial to unlock this answer and thousands more. Enjoy eNotes ad-free and cancel anytime.
Related Questions
- What happens to the confidence interval if you increase the sample size?
- 1 Educator Answer
- For the following estimate confidence interval for population mean with confidence level 90%....
- 1 Educator Answer
- n=200, x=40, 95%confidence Use the sample data and confidence level to construct the confidence...
- 1 Educator Answer
- find a confidence interval for estimating the population mean µ. The confidence level is 95% and...
- 1 Educator Answer
- n=2000,x=400, 95% confidenceUse the sample data and confidence level to construct the confidence...
- 1 Educator Answer