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