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wechsler and kuo 2000 used data from the 1999 college alcohol study to examine the relationship between student alcohol
the following 2 times 2 contingency table shows data for sex and opinion about the legalization of marijuana for
in given example a statistically significant relationship was found between hormone therapy and invasive breast cancer
imagine that 50 men and 50 women are asked do you favor or oppose capital punishment for those convicted of murder in
refer to given exercisea suppose that 500 men and 500 women had been surveyed rather than 50 of each sex as in given
a well-known example of simpsons paradox published by bickel hammel and oconnell 1975 examined admission rates for men
suppose two hospitals are willing to participate in an experiment to test a new treatment and both hospitals agree to
refer to given exercise in which one or more third variables are at least partially likely to account for the observed
this exercise presents a real example of simpsons paradox wagner 1982 the total income and total taxes paid in each of
a researcher observes that compared to students who do not procrastinate students who admit to frequent procrastination
the success rates of two treatments a and b for clinical depression are being compared the research team included five
researchers studied a random sample of north carolina high school students who participated in interscholastic
refer to given exercisea write a two-way table of observed counts for sex and whether a participant in soccer had a
in a national survey n 1000 randomly selected adults are asked how important religion is in their own lives very
the 2 times 2 contingency table that follows shows data for sex and opinion on the death penalty for respondents in the
refer to given exercisea calculate a table of expected counts for the data in given exerciseb show calculations
in a national survey n 1500 randomly selected adults are asked if they favor or oppose a ban on texting while driving
a sample of 90 men and 110 women is asked about their handedness a two-way table of observed counts
explain whether each of the following is possiblea a relationship exists in the observed sample but not in the
the table for given exercise gave data for the relationship between age group and whether or not a person reports ever
in a 1997 poll conducted by the los angeles times 1218 southern california residents were surveyed about their health
anton and edward often play a game together so they decide to see whether or not who goes first affects who wins they
for each of the following measures give the value that implies no difference between the two groups being compareda
this is a modification of exercise 14 the risk of getting lung cancer at some point in ones life for men who have never