Statistical Literacy & Critical Thinking?
1-3 page 18 number 15: (link to answer)
Motorcyclists who survived crashes while not wearing helments testified that the helmets would not have helped them. What important group of people were not able to testify?
Motorcyclists who were not wearing hements who died in motorcyle crashes did not testify.
1-3 page 18 number 19: (link to answer)
If you wished to estimate the average size of a household in Vermont, what's wrong with surveying your college classmates from Vermont?
There is nothing wrong with asking your classmates. However you need to include people who do not go to college in your survey.