+
A SAMPLE OF 144 CANS OF COFFEE SHOWED AN AVERAGE WEIGHT OF 16 OUNCES.

A SAMPLE OF 144 CANS OF COFFEE SHOWED AN AVERAGE WEIGHT OF 16 OUNCES.

Rating:
Rating
(0)
Author: Christine Farr
Description:

http://theperfecthomework.com/a-sample-of-144-cans-of-coffee-showed-an-average-weight-of-16-ounces/

1. A sample of 144 cans of coffee showed an average weight of 16 ounces. The standarddeviation of the population is known to be 1.44 ounces. Construct a 68.26% confidence intervalfor the mean of the population.2. A sample of 144 cans of coffee showed an average weight of 16 ounces. The standarddeviation of the population is known to be 1.44 ounces. Construct a 95.44% confidence intervalfor the mean of the population.3. A random sample of 81 credit sales in a department store showed an average sale of $68.00.From past data, it is known that the standard deviation of the population is $27.00. Construct a95% confidence interval of the population mean.4. A random sample of 81 airline pilots had an average yearly income of $99,400 with astandard deviation of $18,000. Build a 95% confidence interval for the average yearly income ofall pilots.5. The average monthly electric bill of a random sample of 100 residents of a city is $90 with astandard deviation of $24. Construct a 90% confidence interval for the mean monthly electricbills of all residents.6. The average monthly electric bill of a random sample of 100 residents of a city is $90 with astandard deviation of $24. Construct a 95% confidence interval for the mean monthly electricbills of all residents.7. A sample of 64 students from a large university is taken. The average age in the sample was22 years with a standard deviation of 6 years. Construct a 95% confidence interval for theaverage age of the population.8. A researcher is interested in determining the average number of years employees of acompany stay with the company. If past information shows a standard deviation of 7 months, what size sample should be taken so that at 95% confidence the margin of error will be 2months or less?9. In a sample of 400 individuals, 200 indicated they are Democrats. Develop a 95% confidenceinterval for the proportion of people in the population who are Democrats.10. In a random sample of 400 registered voters, 120 indicated they plan to vote for CandidateA. Determine a 95% confidence interval for the proportion of all the registered voters who willvote for Candidate A.


(more)
See More
Try a College Course Free

Sophia’s self-paced online courses are a great way to save time and money as you earn credits eligible for transfer to over 2,000 colleges and universities.*

Begin Free Trial
No credit card required

25 Sophia partners guarantee credit transfer.

221 Institutions have accepted or given pre-approval for credit transfer.

* The American Council on Education's College Credit Recommendation Service (ACE Credit®) has evaluated and recommended college credit for 20 of Sophia’s online courses. More than 2,000 colleges and universities consider ACE CREDIT recommendations in determining the applicability to their course and degree programs.

Tutorial