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create a categorical variable from a quantitative variable consider the study described in example 43 some analyses
replace names by ounces in the mocha frappuccino example the variable size is categorical with tall grande and venti as
sleep and stress or stress and sleep consider the scenario described in example 43 make an argument for treating the
make a data seta create a spreadsheet that contains the spam botnet datab how many cases are in your data setc describe
use your data set using the data set that you created in the previous exercise find graphical and numerical summaries
make a scatterplota make a scatterplot similar to figure 41 for the spam botnet datab mark the location of the botnet
change the unitsa create a spreadsheet with the spam botnet data using the actual values in other words for srizbi use
make a scatterplot in our mocha frappuccino example the 12-ounce drink costs 350 the 16-ounce drink costs 400 and the
are the debts in 2006 and 2007 approximately the same use the methods you learned in chapter 3 to examine whether or
question fuel economy a company with a large fleet of cars hopes to keep gasoline costs down and sets a goal of
what about the countries with very large debts in example 411 we excluded six countries the original data set did not
question marriage in 1960 census results indicated that the age at which american men first married had a mean of 233
whats wrong explain what is wrong with each of the followinga a boxplot can be used to examine the relationship between
make some sketches for each of the following situations make a scatterplot that illustrates the given relationship
who does not have health insurance the lack of adequate health insurance coverage is a major problem for many americans
question golf balls the united states golf association usga sets performance standards for golf balls for example the
which age groups have the larger percent uninsured refer to the previous exercise lets take a look at the data from a
question pizza a researcher tests whether the mean cholesterol level among those who eat frozen pizza exceeds the value
compare the two percents in the previous two exercises you computed percents in two different ways and generated plots
whats in the beer the web site beer100com advertises itself as your place for all things beer one of their things is a
question step-by-step 2nd look this chapters step-by-steps looked at the speeds of cars traveling on triphammer road in
more beer refer to the previous exercisea make a scatterplot of calories versus percent alcohol using the data set
question speed of light in 1882 michelson measured the speed of light usually denoted c as in einstein s famous
lets look at europe refer to the previous exercise figure 410 gives a scatterplot for the same data for the 48 european
manufacturing and product development four people working independently on an assembly line all perform the same task