For each scenario below

  1. Describe a study you could conduct to find out what “you want to know”.
  2. State what your cases/units/subjects are.
  3. Make a list of all the variables in your study. For each one, say whether it is quantitative or categorical.
  4. Write down the null hypothesis and alternative hypotheses (in both words and symbols).
  5. Write down (using good notation) the test statistic you would use. (You won’t be able to compute it as a number because you don’t have any data yet.)
  6. Write down R code you could use to create a randomization distribution. (Make up reasonable names for your data and for the variables.)

You want to know…

  1. You want to know whether smoking rates differe for men and women among students at Calvin.
  2. You want to know whether more people prefer peas or carrots.
  3. You want to know whether Pete’s Peat Moss is better than Max’s Mighty Grow (two soil supplements) at helping plants germinate and grow in the first 4 weeks.
  4. You want to know whether competitive swimmers can swim faster in “wetsuits” than in normal swimsuits.
  5. You want to know whether presenting a public health scenario in terms of how many lives are lost makes people respond differently from presenting it in terms of how many lives are saved.
  6. You want to know whether generally taller people marry taller people and shorter people marry shorter people.
  7. You want to know whether men are more likely to be promoted than equally qualified women.
  8. You want to know whether couples who do not smoke are more or less likely to have boys than couples who both smoke.
  9. You want to know whether men or women gain more wait during their first year in college.
  10. You want to know whether college student gain more weight during their first year in college than high school graduates who do not go to college gain in their first year after high school.
  11. You want to know whether dolphins can communicate.
  12. You want to know … [make up your own scenario that we can test using techniques we have learned so far.]

Of our 5 scenarios, are there any which do not appear on this list?