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1. What is the difference between a histogram and a bar chart? For what type of data would each be appropriate?
2. The following U.S. market shares for 2007 retail car sales have been reported. Source: World Almanac and Book of Facts 2009, p. 122.
Country or Region of Manufacture
2007 market share
North America
69.0%
Japan
15.5
Germany
7.4
Other
8.1
Express the data in the form of a bar chart.
3. The median income for a four-person family has been reported as shown here for 1993-2003.
Source: Time Almanac 2006, p. 627.
1998
$0.18
2004
$0.55
1999
0.20
2005
0.67
2000
0.22
2006
1.00
2001
0.23
2007
1.50
2002
0.24
2008
1.63
2003
0.40
Using these data and the data in Exercise 2.32, draw a line graph that describes both net income and dividend per share of common stock over time. (Both lines will be plotted on the same graph.)
a union shop clause in a contract requires every worker to join the union soon after starting to work for the company.
a regression equation was fit to a set of data for which the correlation r between x and y was 0.6. which of the
Do any of the selected samples seem to be out of the control limits? Describe.
Determine a 95% confidence interval for true mean cost to repair this type of car.
You decide to calculate the coefficient of determination (R2) as part of determining the goodness of fit of an equation. Using the preliminary calculations below, calculate the R2 and determine its meaning.
a) yes, because the tst value -3.46 falls in the noncritical region. b) no, because the test value -1.98 falls in the critical region. c) yes, becasue the test value -3.46 falls in the critical region. d) no because the tst value -1.98 falls in the n..
An SRS of 25 faculty members at a large southeastern university found that 10 felt that the university was supportive of female and minority faculty. What is the p-value of your test
waiting times to receive food after placing an order at the local subway sandwich shop follow an exponential
Profitability at a bank is declining as customers are shifting to other banks. As a researcher, identify the problem (root cause of the symptom) through a scientifically crafted research proposal.
Provide examples of a different data collection method and a data collection instrument used in managerial research. Why is it important to ensure that these data collection methods and instruments are both reliable and valid?
How much net revenue does the state expect, on average from each ticket? What is the risk preference of people who play this lottery?
Yyielding a $20,000 profit, and a 30% chance that the building will sell for $230,000, yielding a $70,000 profit. What is the expected profit? = E( X - ) = ( xi - What is Var(X)?
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