Conclude a hypothesis test, Macroeconomics

Assignment Help:

Will improving customer service result in higher stock prices for the companies providing the better service? When a companys satisfaction score has improved over the prior years results and is above the national average (currently 75.7), studies show its shares have a good chance of outperforming the broad stock market in the long run (Business- Week, March 2, 2009). The following satisfaction scores of three companies for the 4th quarters of 2007 and 2008 were obtained from the American Customer Satisfaction Index. Assume that the scores are based on a poll of 60 customers from each company. Because the polling has been done for several years, the standard deviation can be assumed to equal 6 points in each case.

Company 2007 Score 2008 Score
Rite Aid 73 76
Expedia 75 77
J.C. Penney 77 78

a. For Rite Aid, is the increase in the satisfaction score from 2007 to 2008 statistically significant?
Use ? ? = :05. What can you conclude?

b. Can you conclude that the 2008 score for Rite Aid is above the national average of 75.7? Use ? ? = :05.

c. For Expedia, is the increase from 2007 to 2008 statistically significant? Use ? = :05.

d. When conducting a hypothesis test with the values given for the standard deviation, sample size, and ?, how large must the increase from 2007 to 2008 be for it to be statistically significant?

e. Use the result of part (d) to state whether the increase for J.C. Penney from 2007 to 2008 is statistically significant.


Related Discussions:- Conclude a hypothesis test

E.., law of indefference curve

law of indefference curve

Shortage graph, I am writing a macroeconomics commentary about a supply sho...

I am writing a macroeconomics commentary about a supply shock-induced inflation, can I include a shortage diagram I learnt in microeconomics and just change demand and supply to AD

Estimating womens labor supply, 1.    Estimating Women's Labor Supply a....

1.    Estimating Women's Labor Supply a.    The following regression was run for an estimate of the current women's labor supply curve: Where h i = hours of labor suppl

Benefits and disadvantages of each scenario, Do you think that public admin...

Do you think that public administrators should be restricted to only laid down rules in the discharge of their duties as espoused by Max Weber or should they have some amount of di

What are the production elasticities of demand, The following Cobb-Douglas ...

The following Cobb-Douglas production function is used to describe the output generated by a local government maintenance agency. Q = αL β1 K β2 E β3 Where L represents numb

Servicing the maximum number of patients, A clinic uses doctors and nurses ...

A clinic uses doctors and nurses optimally and is servicing the maximum number of patients given a limited annual payroll. The last doctor hired treated 1,600 extra patients in a y

Expected cost of building the boat, Half the members of a fishing tribe cat...

Half the members of a fishing tribe catch four fish per day and half catch 10 fish per day. A group of 10 members could build a boat for another tribe in one day and receive a paym

Relationship with 8 variants of national product aggregates, RELATIONSHIP W...

RELATIONSHIP WITH 8 VARIANTS OF NATIONAL PRODUCT AGGREGATES  We have shown the distinction between national product at market prices and national product at factor cost, based

Show the ad curve over time, Q. Show the AD curve over time? With infla...

Q. Show the AD curve over time? With inflation, AD curve will no longer be stable over time. In its place, it will glide upwards or downwards at a rate determined by growth rat

Population growth is greater than the growth of real output, If population ...

If population growth is greater than the growth of real output, A. real per capita Gross Domestic Product (GDP) growth will be less than the growth of real Gross Domestic Product

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