Exam 1: The Benefits and Risks of Using Statistics

Suppose you are conducting an experiment that involves assigning each of 100 participants to one of two groups: Group A or Group B.Which of the following would not be considered to be a random assignment of participants to groups?

Suppose you want to conduct a survey to determine who is most likely to win the next presidential election.Which of the following would be considered to be a representative (unbiased) sample?

Suppose researchers who conduct a vitamin study conclude in an evening news sound byte that "Daily vitamin use is good for everyone." You get a copy of the study they referred to, and find that the participants were all healthy young males who exercised regularly.Explain why the headline is misleading from a statistical standpoint.

For Questions , use the following narrative Narrative: Babysitting Suppose a recent study of 1,000 teenagers in the U.S.found that 33% of them do babysitting to earn extra money. -{Babysitting Narrative} Which of the following describes the sample for this example?

Which of the following is not a misuse of statistics?

For Questions , use the following narrative Narrative: Babysitting Suppose a recent study of 1,000 teenagers in the U.S.found that 33% of them do babysitting to earn extra money. -{Babysitting Narrative} Which of the following describes the population for this example?

For Questions , use the following narrative Narrative: Marijuana and brain Researchers at the University of Iowa College of Medicine reported that a test showed those who smoked seven or more marijuana joints per week had lower math scores than non-marijuana users.A related headline says "New study confirms too much pot impairs brain". -{Narrative: Marijuana and brain} Explain why these results must have been based on an observational study, and not an experiment.

Explain why you cannot make causal connections with an observational study.

Suppose you want to determine how Americans feel about reality TV.Which of the following samples contains the least amount of bias?

The conclusions that can be drawn from an observational study are not as strong as the conclusions that can be drawn from a(n) __________.

Name one way that you have used statistics in your own life.

Which of the following is not true about the subject of statistics?

Most statistical studies fall into one of two types, either an observational study or a randomized __________.

Suppose it is reported that the state of Texas has the highest number of tornadoes in the U.S.each year, and thus it is more dangerous to live in Texas than other states if you are worried about tornadoes.Explain why these results are misleading and how they need to be recalculated.

Which of the following is not an example of a situation involving statistics?

For Questions , use the following narrative Narrative: Marijuana and brain Researchers at the University of Iowa College of Medicine reported that a test showed those who smoked seven or more marijuana joints per week had lower math scores than non-marijuana users.A related headline says "New study confirms too much pot impairs brain". -{Narrative: Marijuana and brain} Explain why the headline is misleading.

Which of the following questions cannot be addressed using statistics?

Statistics is a collection of procedures and principles for gaining and analyzing information in order to help people make decisions when faced with __________.

Which of these does not apply to the word 'statistics'?

Which of the following is necessary to conduct a study properly?