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McGraw-Hill Math Grade 7 Answer Key Lesson 22.3 Box-and-Whisker Plots
Exercises
INTERPRET
Question 1.
Which of the three classes has the widest range of scores? The smallest range?
Widest Range ______________
Smallest Range _______________
Answer:
Widest Range is Botany.
Smallest Range is Zoology.
Explanation:
Box – and – Whisker plot,
which allows us to quickly look at data to tell where most of the numbers lie.
The lowest number in set of data is called the lower extreme and the greatest number is called upper extreme.
The median of the numbers from the lower extreme to the median is called the lower quartile.
The median of the numbers from the upper extreme to the median is called the upper quartile.
Widest Range is Botany.
Smallest Range is Zoology.
Question 2.
Which class has the highest median score?
Answer:
Zoology
Explanation:
The highest median score is zoology.
Box – and – Whisker plot
which allows us to quickly look at data to tell where most of the numbers lie.
The lowest number in set of data is called the lower extreme and the greatest number is called upper extreme.
The median of the numbers from the lower extreme to the median is called the lower quartile.
The median of the numbers from the upper extreme to the median is called the upper quartile.
Make a box-and-whisker plot with the following data:
Minimum – 15
Q1 – 25
Q2 – 35
Q3 – 45
Maximum – 55
Explanation:
Lower extreme(Minimum) – 15
Q1 – 25
Q2 – 35
Q3 – 45
Upper extreme(Maximum) – 55
Box – and – Whisker plot,
which allows us to quickly look at data to tell where most of the numbers lie.
the lowest number in set of data is called the lower extreme and the greatest number is called upper extreme.
The median of the numbers from the lower extreme to the median is called the lower quartile.
The median of the numbers from the upper extreme to the median is called the upper quartile.
Question 3.
What is the range of this plot? The median?
Range _______________
Median _______________
Answer:
Range = 40;
median = 35.
Explanation:
Lower extreme(Minimum) – 15
Q1 – 25
Q2 – 35
Q3 – 45
Upper extreme(Maximum) – 55
Range =Upper extreme(Maximum) – Lower extreme(Minimum) = 55 -15 = 40
median = (Q3 + Q1)/2
= (45 + 25)/2 = 35
Box – and – Whisker plot,
which allows us to quickly look at data to tell where most of the numbers lie.
the lowest number in set of data is called the lower extreme and the greatest number is called upper extreme.
The median of the numbers from the lower extreme to the median is called the lower quartile.
The median of the numbers from the upper extreme to the median is called the upper quartile.
Question 4.
What is the lower quartile? The upper quartile?
Lower Quartile _______________
Upper Quartile _______________
Answer:
Lower Quartile 15-25
Upper Quartile 45-55
Explanation:
Box – and – Whisker plot,
which allows us to quickly look at data to tell where most of the numbers lie.
the lowest number in set of data is called the lower extreme and the greatest number is called upper extreme.
The median of the numbers from the lower extreme to the median is called the lower quartile.
The median of the numbers from the upper extreme to the median is called the upper quartile.
Lower Quartile 15-25
Upper Quartile 45-55