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look once more at the data from the tour de france in exercise 32 we looked at the whole history of the race but now
residuals suppose you have fit a linear model to some data and now take a look at the residuals for each of the
gas mileageas the example in the chapter indicates one of the important factors determining a cars fuel efficiency is
in a chance magazine article summer 2005 danielle vasilescu and howard wainer used data from the united nations center
gas mileage revisited let s try the re-expressed variable fuel consumption gal100 mi to examine the fuel efficiency of
earningsprice ratioinvestors often judge the value of a stock by considering the company s earnings after taxes
treasury bills the 3-month treasury bill interest rate is watched by investors and economists heres a scatterplot of
gdp the scatterplot shows the gross domestic product gdp of the united states in billions of dollars plotted against
better gdp model consider again the post-1950 trend in us gdp we examined in given exercise here are a regression and
pressure scientist robert boyle examined the relationship between the volume in which a gas is contained and the
brakes the table below shows stopping distances in feet for a car tested 3 times at each of 5 speeds we hope to create
more unusual points each of the following scatterplots shows a cluster of points and one stray point for each answer
whats the cause suppose a researcher studying health issues measures blood pressure and the percentage of body fat for
whats the effect a researcher studying violent behavior in elementary-school children asks the children s parents how
reading to measure progress in reading ability students at an elementary school take a reading comprehension test every
a college admissions officer defending the college s use of sat scores in the admissions process produced the graph
heating after keeping track of his heating expenses for several winters a homeowner believes he can estimate the
speed how does the speed at which you drive affect your fuel economy to find out researchers drove a compact car for
for this assignment you will examine correlation and bivariate regression testing please provide an email address where
interest rates heres a plot showing the federal rate on 3-month treasury bills from 1950 to 1980 and a regression model
ages of couples 2003 the graph shows the ages of both men and women at first marriage wwwcensus govclearly the pattern
interest rates revisited in given exercise you investigated the federal rate on 3-month treasury bills between 1950 and
ages of couples again has the trend of decreasing difference in age at first marriage seen in exercise gotten stronger
gestation for women pregnancy lasts about 9 months in other species of animals the length of time from conception to