AP Statistics 2017

kg. Slope: On average, left-hand strength increases by 0.35 kg for each 1 kg increase in right-hand s ...

CHAPTER 7 Two-Variable Data Analysis In the scatterplot, the dashed lines represent the mean values of t ...

The Department of Transportation regularly collects and publishes data on airline performance. To see if ther ...

The fertility rate (average number of children per woman) in a country can be used to predict the l ...

CHAPTER 8 Design of a Study: Sampling, Surveys, and Experiments IN THIS CHAPTER Summary: This chapter stands ...

about how the data came into our possession. The last part of this book deals with statistical infe ...

and then the rest are chosen according to some well-defined pattern. For example, if you wanted 100 peop ...

representative. The danger in all nonprobability samples is that some (unknown) bias may affect the degree to ...

had the choice to do it over again. This is most likely representative only of those parents who were ...

services voluntarily be seeing their counselor?). Also, because the counselor is administering the questionnair ...

It may be, even in a controlled experiment, that the measured response is a function of variables presen ...

which case the diagram could be modified. The control group can either be an older treatment (like a medica ...

Double-Blind Experiments In the example above, it was explained that neither the subjects nor the researchers knew ...

group of males. To simplify the example, suppose that we were only testing one level (say 500 mg) of ...

environment in which the experiment was conducted. The randomization controlled for unknown influences that might ...

is the poll likely to find? Answer : The poll is likely to find that, overwhelmingly, respondents think th ...

(b) II only (c) III only (d) I and III only (e) I and II only You want to d ...

Which of the following is not an example of a probability sample ? (a) You are going to sample ...

You are interested in the extent to which ingesting vitamin C inhibits getting a cold. You identify ...

those that didn’t use vitamin C. Question #8 asked you about possible confounding variables in this study. ...