Shikhar6898 wrote:
1.2 Assuming that no individual played video games for more than 20 hours per week, then the greatest possible value for the mean number of hours of video game-playing per week for the group is___________hours.
Average time spent by All teenagers in playing games =
\frac{# of teenagers*hours spent}{20}
Since no teenager played more than 20 hours, highest time spent playing by one teenager will be 20
2*1 = 2
4*2 = 8
5*3 = 15
3*4 = 12
4*5 = 20
1*7 = 7
1*20 = 20
Total = 84
How Come (1*20) ?
It should be 1*10 know, Making the total 74
74/20 = 3.7
3.7 - B (Answer)
Look at the information given-
The chart summarizes the results of a study where twenty teenagers were surveyed about the time they spent each week playing video games. Two reported playing video games for 1 hour, 4 reported playing for 2 hours, etc. while
1 respondent reported playing video games for more than 10 hours.Remember it is more than 10 hours. And now look at the question itself -
Assuming that no individual played video games for more than 20 hours per week, then the greatest possible value for the mean number of hours of video game-playing per week for the group is___________hours.
So for calculating the greatest value of mean, we need the max value for that one individual, which is 20 in this case.