Thirty students at Eastside High School took the SAT on the same Saturday.Their raw scores are given next. Consider a frequency distribution of the data that groups the data in classes of 1400 up to 1600,1600 up to 1800,1800 up to 2000,and so on.How many students scored at least 1800 but less than 2000?
A) 3
B) 7
C) 12
D) 18

Question

Thirty students at Eastside High School took the SAT on the same Saturday.Their raw scores are given next.  Consider a frequency distribution of the data that groups the data in classes of 1400 up to 1600,1600 up to 1800,1800 up to 2000,and so on.How many students scored at least 1800 but less than 2000?
A) 3 
B) 7 
C) 12 
D) 18

Quizplus · Accepted Answer

To group the data in classes of 1400 up to 1600, 1600 up to 1800, 1800 up to 2000, and so on, we need to determine the class boundaries. The lower boundary for the first class is 1399.5 (halfway between 1400 and 1600), and the upper boundary for the last class is 2200.5 (halfway between 2200 and 2400). Then we count how many students fall into the class boundaries of 1800 up to 2000: there are 6 students in the 1800-2000 class, and another 6 students in the 2000-2200 class. So the total number of students who scored at least 1800 but less than 2000 is 6.

Thirty Students at Eastside High School Took the SAT on the Same