Question

There are
1
,
200
students in a middle school with
400
students in each grade. Fifty students from each grade were randomly selected and asked if they have ever visited a state park. The results are shown in the table.



Grade Visited a State Park
Sixth
17

Seventh
28

Eighth
20



What is the BEST estimate of the percentage of the
1
,
200
students that have visited a state park?



A.
30
%
to
40
%

B.
40
%
to
50
%

C.
50
%
to
60
%

D.
60
%
to
70
%

Answer 1

Total sampled = 50 + 50 + 50 = 150. Total who visited = 17 + 28 + 20 = 65.
Proportion = 65/150 = 0.4333… ≈ 43.3%, so about 43% of the 1,200 students ≈ 520 students.

This falls in 40% to 50%, so answer B.