What is the margin of error, Basic Statistics

Assignment Help:

The National Quality Research Center at the University of Michigan provides a quarterly measure of consumer opinions about products and services (The Wall Street Journal, February 18, 2003). A survey of 10 restaurants in the Fast Food/Pizza group showed a sample mean customer satisfaction index of 71. Past data indicate that the population standard deviation of the index has been relatively

stable with σ = 5

a. What assumption should the researcher be willing to make if a margin of error is desired?

b. Using 95% confidence, what is the margin of error?

c. What is the margin of error if 99% confidence is desired?

 


Related Discussions:- What is the margin of error

T distribution, t distribution has proportionately smaller areas in its tai...

t distribution has proportionately smaller areas in its tail than normal distribution. is it true?

What is an irrevocable letter of credit?, What is an irrevocable letter of ...

What is an irrevocable letter of credit? A permanent mail of credit score is a financial instrument used by banks to guarantee a customer's obligations to a supplier. It is perm

Compute the value for the test statistic-spss, A number of years ago the Am...

A number of years ago the American Academy of Pediatrics recommended that tetracycline drugs not be used for children under the age of 8. Prior to this recommendation, a two-year s

Statistics for management, characteristics of statistics and any two applic...

characteristics of statistics and any two application of statistics

Electric fields, 2. Two disks, each of radius 10.0 cm, are charged so that ...

2. Two disks, each of radius 10.0 cm, are charged so that one has a charge of +10.0 nC and the other has a charge of -10.0 nC. The disks are then placed with their flat faces facin

What is a purchase return, What is a purchase return? A buy purchase re...

What is a purchase return? A buy purchase return occurs when a buyer profits products that it has bought from a provider. Under the regular inventory system, the cost of the

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd