Confidence the improvement in sales

Assignment Help Basic Statistics

Reference no: EM13962242

To determine the effect of advertising in the Yellow Pages, Bell Telephone took a sample of 40 retail stores that did not advertise in the Yellow Pages last year but did so this year. The annual sales (in thousands of dollars) for each store in both years were recorded.

a. Estimate with 90% confidence the improvement in sales between the two years.

b. Can we infer that advertising in the Yellow Pages improves sales?

c. Check to ensure that the required condition(s) of the techniques used in parts (a) and (b) is satisfied. d. Would it be advantageous to perform this experiment with independent samples? Explain why or why not.

Reference no: EM13962242

Questions Cloud

Management different than straight financial accounting : What are some key components to monitor the health of the project, as it relates to earned value? How is earned value management different than straight financial accounting?

Making managerial decisions in general : Your company, Diamond Dynamics, is researching whether or not it would be a good decision to invest in new manufacturing equipment that will significantly speed up production time on the assembly line. Explain the limitations of a CVP analysis in thi..

Examine the experiences of the local populations : Examine the experiences of the local populations and varied demographics, including African Americans, women, and lower classes. What changed because of the movement from isolationism to expansionism

What are they focusing on in addressing the challenge : What problem or challenge do they have and what are they focusing on in addressing the challenge? What did you find interesting? What company is the subject for your Business Report and what problem can you help them address through the use of IT?

Confidence the improvement in sales : To determine the effect of advertising in the Yellow Pages, Bell Telephone took a sample of 40 retail stores that did not advertise in the Yellow Pages last year but did so this year. The annual sales (in thousands of dollars) for each store in bo..

A sinusoidal voltage of 10 v rms is applied at terminals 11'' : The transformer in the following circuit (see attached file Figure 4.10) has a turns ratio of 10.

Prepare a master production schedule : Prepare a master production schedule for industrial pumps in the manner of the following table. Use the MPS rule to "schedule production when the projected on-hand inventory would be less than 10 without production." Suppose that a production lot siz..

International monetary fund : The Global Financial Stability Report is a semiannual report published by the International Capital Markets division of the International Monetary Fund ( IMF). The report includes an assessment of the risks facing the global financial markets. Locate..

Semiconductor manufacturing process : In a semiconductor manufacturing process, three wafers from a lot are tested. Each wafer is classified aspassorfail. Assume that the probability that a wafer passes the test is 0.8 and that wafers are independent.

User Account

All Pages