Question

PLS HELP ITS MY BDAY TOMORROW

Jay measured the lengths of 16 fish.
Use the graph below to estimate the lower
and upper quartiles of the lengths.
Cumulative frequency
20-
18-
16-
14-
12-
10-
8-
6-
4-
+ NO
2-
0
-10
Lengths of fish
10 15 20 25 30 35 40
Length (inches)

Answer 1

• lower quartile: 10
• upper quartile: 25

Explanation:

You want to use the graph to estimate the lower and upper quartiles of the lengths of the 16 fish that Jay measured.

Quartiles

The lower quartile is comprised of the 1/4 of the total number of fish that are the shortest. The graph shows that 4/16 of the fish are 10 inches or less, so the lower quartile is 10 inches.

The upper quartile is comprised of the 1/4 of the total number of fish that are the longest. The graph shows that 12/16 of the fish are 25 inches or less, so 4/16 of the fish are 25 inches or more. The upper quartile is 25 inches.

The lower and upper quartiles are 10 inches and 25 inches, respectively.

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