# Statistics Homework

Mar 19th, 2014
HelloWorld
Category:
Statistics
Price: \$30 USD

Question description

Hello I have two homework questions that I need assistance with.  This involves analyzing variances.  Answers should be in excel showing work.

1.  Seitz’s list of several hundred business-to-business customers continues to grow.  Managers would like to know whether the average dollar amount of sales per transaction per customer has changed from last year to this year.  Suppose company accountants sampled 20 customers randomly from last year’s records and determined that the mean sales per customer was \$2,300, with a standard deviation of\$500.They sampled 25 customers randomly from this year’s ﬁles and determined that the mean sales per customer for this sample was \$2,450, with a standard deviation of\$540.Analyze these data and summarize your ﬁndings for managers.  Explain how this information can be used by decision makers.  Assume that sales per customer are normally distributed.

2.  Pipeline operators estimate that it costs between \$75 and \$500 in U.S. currency to replace each seal, thus making the Clarkson longer-lasting valves more attractive.  Tyco does business with pipeline companies around the world.  Suppose in an attempt to develop marketing materials, Tyco marketers are interested in determining whether there is a signiﬁcant difference in the cost of replacing pipeline seals in different countries. Four countries— Canada, Colombia, Taiwan, and the United States—are chosen for the study.  Pipeline operators from equivalent operations are selected from companies in each country.  The operators keep a cost log of seal replacements. A random sample of the data follows. Use these data to help Tyco determine whether there is a difference in the cost of seal replacements in the various countries. Explain your answer and tell how Tyco might use the information in their marketing materials.

 Canada Columbia Taiwan US 215 355 170 230 205 280 190 190 245 300 235 225 270 330 195 220 290 360 205 215 260 340 180 245 225 300 190 230

(Top Tutor) Daniel C.
(997)
School: Carnegie Mellon University

Studypool has helped 1,244,100 students

## Review from our student for this Answer

FratBro23
Mar 19th, 2014
"Top quality work from this guy! I'll be back!"

1831 tutors are online

Brown University

1271 Tutors

California Institute of Technology

2131 Tutors

Carnegie Mellon University

982 Tutors

Columbia University

1256 Tutors

Dartmouth University

2113 Tutors

Emory University

2279 Tutors

Harvard University

599 Tutors

Massachusetts Institute of Technology

2319 Tutors

New York University

1645 Tutors

Notre Dam University

1911 Tutors

Oklahoma University

2122 Tutors

Pennsylvania State University

932 Tutors

Princeton University

1211 Tutors

Stanford University

983 Tutors

University of California

1282 Tutors

Oxford University

123 Tutors

Yale University

2325 Tutors