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reuters june 24 1997 reported on a study published in the journal of the american medical association 1997 vol 277 pp
a story at abcnewscom pet contact by rita rubin march 17 1998 reported that karen allen a researcher at the university
find an example of an observational study in the news determine whether or not it was a case-control study and whether
a study will be done to determine the relationship if any between where a college student lives on-campus or off campus
suppose researchers were interested in determining the relationship if any between the use of cellular telephones and
a medical researcher wants to know how lifetime sun exposure affects the risk of skin cancer for persons over 50 years
suppose you want to know whether men or women spend more time talking on a cell phone during a weeks timea describe how
a teacher wants to determine how class attendance during the term affects grades on the final exama describe how the
echinacea is an herb that may help to prevent colds and flu explain how researchers could conduct a double-blind
refer to given exercise in each case explain whether a control group was used and whether a placebo treatment was
refer to given exercise in each case explain whether the experiment was a matched-pair design a block design or
refer to given exercise in each case designate the explanatory variable and the response variableexercise explain
one hundred volunteers agree to participate in an experiment there are four treatments each of which will be assigned
a fast-food chain sells its burgers alone or as part of a value meal that includes fries and a drink they know that
explain whether each of the following experiments was single-blind double-blind or neithera an electric company wanted
refer to given case study quitting smoking with nicotine patches which used a completely randomized design explain how
a school district has 20 elementary schools and each school has 12 classes that can be used for a studya using schools
twenty volunteers aged 40 to 65 years old will participate in an experiment to compare two methods of memorizing
researchers want to design a study to compare topical cream applied to the skin and a drug taken in capsule form for
twenty grocery stores will participate in an experiment to compare the effectiveness of two methods for displaying a
twenty students agreed to participate in a study on colds ten were randomly assigned to receive vitamin c and the
remember that a confounding variable affects the response variable and is related to the explanatory variable for each
this is also given exercise suppose that an observational study showed that students who got at least seven hours of
this is also given exercise for each of the examples given here decide whether the study was an observational study or