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

TRENDS , Why do we particularly omit the middle year when using the semi-av...

Why do we particularly omit the middle year when using the semi-average method to fit a trend line

Buildings solutions, Buildings solutions Permanent arrangements owned or ...

Buildings solutions Permanent arrangements owned or held by the state. The cost of buildings includes both acquisition costs (historical cost, ancillary costs, and, for proprieta

Multiple linear regression, #multiple linear regression of y on x1 & x2 fro...

#multiple linear regression of y on x1 & x2 from data relating to 3 variables i.e y=4,6,77,9,13,15 x1=15,12,8,6,4,8 x2=30,24,20,14,10,4

Spectrum, example for pure and impure spectrum

example for pure and impure spectrum

Hierarchical clustering , Hierarchical Clustering   Five, two-dimens...

Hierarchical Clustering   Five, two-dimensional data points are shown below: x y -0.43 1.19 -1.66 1.1

What is use of Advantageous , What is use of Advantageous Immediate non-fi...

What is use of Advantageous Immediate non-financial, work-related advantages accruing to the condition.

Calculate and interpret, U.S. College presidents have described alcohol abu...

U.S. College presidents have described alcohol abuse as the number one problem on campus.  How common is it?  As a super crackerjack student, you conducted a survey of 17,096 stude

Compute the z scores, 1. Compute the z scores for the following raw scores ...

1. Compute the z scores for the following raw scores where   = 78 and the standard deviation = 4. a. 72 b. 82 c. 78 d. 87 e. 71

Mathematical theory in otc, All parts should be answered as briefly as poss...

All parts should be answered as briefly as possible (quality not quantity!). A few sentences will suffice. Just get your opinions across succinctly. Unnecessarily long answers will

Sampling distribution, The heights of a large population of adult females w...

The heights of a large population of adult females who play basketball are normally distributed with a mean of 175cm and a standard deviation of 7.5cm. (a) what proportion of this

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