An ecologist studied a sample of 33 turtles in a certain region. Their weight in kilograms was noted and
the results are summarized below. Use the following table and frequency polygon to answer these
questions.
x = kg per turtle x midpoints y = freq. of turtles)
9≤x≤15
12
15 ≤x<21
18
21 < x < 27
24
30
36
42
y-freq (of turtles)
94
27 33 < x < 39
39 ≤ x < 45
6-
12 18 24 30 36 42 48 54
x-Ag per turtle
3
8
4
2
9
7
3. How many turtles in this sample were from 21 to 27 kg?
>. How many were at least 33 kg heavy in this sample?