Researchers are interested in the amount of time it takes Americans to get to work. For each of the situations below, tell which of these is the focus: data production, displaying and summarizing data, probability, or statistical inference.
a. Based on results from a survey, a researcher considers whether to report the median or the mean travel time. What is the focus at this stage?
b. Researchers consider asking people not to include any additional time spent stopping for breakfast, dropping children off at school, etc., when they report their typical travel-to-work time. What is the focus at this stage?
c. If we want to use information from a sample survey to draw conclusions about time it takes all Americans to get to work, then the focus is on which of the four processes?
d. We'll assume Americans take a certain time on average to get to work. If we consider the likelihood of sample mean being above a certain value for a sample of a given size, then the focus is on which of the four processes?