Business Statistics: A First Course (8th Edition)
8th Edition
ISBN: 9780135177785
Author: David M. Levine, Kathryn A. Szabat, David F. Stephan
Publisher: PEARSON
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Burning fuels in power plants and motor vehicles emits carbon dioxide (CO2), which contributes to global warming. The
CO2 emissions (metric tons per capita) for countries varies from 0.02 in Burundi to 44.02 in Qatar. Although the data set
includes 214 countries, the CO2 emissions of 15 countries are not available on the World Bank database. The data set is
too large to display but the data for the first five countries is given. Use the full data set with data on the 214 countries to
answer the questions.
To access the complete data set, click the link for your preferred software format:
Excel Minitab JMP SPSS TI R Mac-TXT PC-TXT CSV Crunchlt!
Country CO2 Emissions (Metric Tons per Capita)
Aruba
23.92
Andorra
5.97
Afghanistan
0.43
Angola
1.35
Albania
1.61
Find the mean and the median for the full data set. Round your answers to three decimal places.
The mean for these data is
tons per person
The median for these data is
tons per person
A particular magazine identified the top accounting firms in 8 geographic regions across a certain country. Even though all 8 regions reported growth in the past year,
region A and region B reported the highest combined growths, with 17% and 25%, respectively. A characteristic description of the accounting firms in these regions
included the number of partners in the firm. The accompanying table contains data on the number of partners. Complete parts (a) through (d) below.
E Click on the icon to view the data table.
IMPORTANT NOTE: In all of these questions, there are 2 possible ratios A/B and B/AI Our convention is to always assume that the larger variance is in the
numerator (i.e., on top). The correct answer will always be found in this fashion. Similarly, in questions about a critical value, we shall consider the right
(upper) tail.
a. At the 0.01 level of significance, is there evidence of a difference in the variability in numbers of partners for region A accounting firms and…
When exposed to an infection, a person typically develops antibodies. The extent to which theantibodies respond can be measured by looking at a persons titer, which is a measure of the number of antibodies present. The higher the titer is, the more antibodies that are present. The data in Table represent the titers of 11 ill people and 11 healthy people exposed to the tularemia virus in Vermont. Is the level of titer in the ill group greater than the level of titer in the healthy group? Use the α = 0.10 level of significance.
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