An ecologist who was studying starfish populations collected starfish of the species Pisaster was interested in the distribution of sizes of starfish on a certain shoreline. One measure of size is "arm length." Below is a cumulative relative frequency distribution for the arm length, in centimeters, of 102 Pisaster individuals. Cumulative relative frequency (%) e 100- 80 60- 40- 20- 0 T T 10 12 14 16 18 20 Pisaster arm length (cm) What are the approximate values of the median and interquartile range of this distribution? O a median = 13; interquartile range = 4 Ob median = 13; interquartile range = 13 and 16 Oc median 15; interquartile range 12 and 16 Od median = 13; interquartile range = 3 median = 15; interquartile range = 4 6 8
An ecologist who was studying starfish populations collected starfish of the species Pisaster was interested in the distribution of sizes of starfish on a certain shoreline. One measure of size is "arm length." Below is a cumulative relative frequency distribution for the arm length, in centimeters, of 102 Pisaster individuals. Cumulative relative frequency (%) e 100- 80 60- 40- 20- 0 T T 10 12 14 16 18 20 Pisaster arm length (cm) What are the approximate values of the median and interquartile range of this distribution? O a median = 13; interquartile range = 4 Ob median = 13; interquartile range = 13 and 16 Oc median 15; interquartile range 12 and 16 Od median = 13; interquartile range = 3 median = 15; interquartile range = 4 6 8
MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Transcribed Image Text:An ecologist who was studying starfish populations collected starfish of the species Pisaster was interested in the distribution of sizes of
starfish on a certain shoreline. One measure of size is "arm length." Below is a cumulative relative frequency distribution for the arm
length, in centimeters, of 102 Pisaster individuals.
Cumulative relative frequency (%)
Oc
Od
O e
100-
80-
60-
40-
20-
0
12 14 16 18 20
Pisaster arm length (cm)
What are the approximate values of the median and interquartile range of this distribution?
O a
median = 13; interquartile range = 4
O b
median = 13; interquartile range = 13 and 16
median = 15; interquartile range = 12 and 16
median = 13; interquartile range = 3
median = 15; interquartile range = 4
6
8
10
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