Doug and David are
researchers who examine youth health. Numerous recent studies have suggested
that youth in the 10- to 15-year-old range are increasingly engaged in many
hours of video game playing, they are not active enough (as defined by at least
one hour of exercise per day), and they are disconnected to their family units.
However, in some of their own previous research Doug and David found that
although students play a lot of video games they remain active and engage in
sufficient exercise. In their current study they asked children to keep a log
and then to report for a given week the number of hours of video game playing
and exercise that they engage in and also to report the number of dinners that
their families eat together as a measure of family connection. They also
collected gender and age as demographic data.
1. Identify the level
of measurement for each of the following variables: Age (reported in years),
Gender (reported as Female=1; Male=2), Hours of video game playing in
the week (reported to the quarter hour), Exercise (reported to the quarter
hour), and Dinners taken together as a family (0-7 dinners in the week).
2. Which is the best measure of central tendency (mean, median or mode) for
each variable? Calculate the best measures of central tendency for each
3. Are there more girls or boys in the sample? On average, do youth in the
sample spend more time playing video games or exercising?
4. How many boys are there in the sample?
5. What is the average number of hours spent playing video games?
6. What is the average age of participants?
7. What is the mode number of family dinners experienced by participants in the