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in each of the following situations indicate whether the potential bias is a selection bias a nonparticipation bias or
to estimate the percentage of households in the united states that use a dvd player a researcher surveys a randomly
in a class of 20 students john maria inez bill etc a simple random sample of two people will be selected from the
a friend has recommended the work of a musician who has recorded five cds each containing ten selections you decide to
refer to given exercise suppose that you randomly chose four of the cds and then randomly chose one song from each one
for each definition identify the correct term for the type of bias being defined possible answers are selection bias
refer to the three types of bias given which type of bias do you think would be introduced in each of the following
for each of the following situations explain whether or not the fundamental rule for using data for inference holdsa
the us government gathers numerous statistics based on random samples but every 10 years it conducts a census of the us
a television rating agency produces the ratings of television shows by asking a random sample of about 5000 households
a survey is planned to estimate the proportion of voters in a community who plan to vote for candidate y calculate the
in a random sample of 90 students at a university 72 students 80 or 80 of the sample say that they use a laptop
in given exercise data were given for admissions to two graduate programs for men and women the data are given again
according to a study on partner abuse reported by the sacramento bee july 14 2000 p a6 associated press 25 of women
for this exercise use the student2010 dataset on the companion website the variable use cell gives student responses to
the infamous literary digest poll of 1936before the presidential election of 1936 a contest between democratic
in each case briefly discuss whether you think the available sample data can be used to make an inference about the
the median income for a random sample of households in a school district was found to be 56300 from this information
a political scientist surveys 400 voters randomly selected from the list of all registered voters in a community the
saliva test predicts labor onset was the headline of a reuters health story that appeared may 23 2000 at the yahoo
refer to exercises 2 and 1 find the odds ratio for remaining free of heart disease for men with no anger compared with
refer to the data in exercise 1 showing the frequency of coronary heart disease for men with no anger and men with the
given exercise concerned the relationship between anger and the risk of coronary heart disease some computer output for
given example was about the relationship between hormone therapy and invasive breast cancer one of the results reported