17. A survey of 500 radio
ev of 500 radio listeners was conducted to find the number who listened to a weekly political
am. Of the listeners surveyed, 120 said that they had listened to the political program at least once. It
n additional 2,500 listeners are surveyed, which is the best prediction of the number of those listeners
who have listened to the political program at least once?
A
B
750
600
1,200
800
D
A random survey of 140 seventh graders from the various middle schools in a school district determine
that 120 of them had a cell phone. Using the survey results, which is the best prediction for how many
100 seventh graders in the district have a cell phone?