Practice the questions of McGraw Hill Math Grade 8 Answer Key PDF Lesson 24.3 Box-and-Whisker Plots to secure good marks & knowledge in the exams.
McGraw-Hill Math Grade 8 Answer Key Lesson 24.3 Box-and-Whisker Plots
Exercises
INTERPRET
Question 1.
Give the lower quartile for the box-and whisker plot.
Answer:
Weight 70 is the lower quartile for the box-and whisker plot.
Explanation:
The lower quartile, or first quartile (Q1), is the value under which 25% of data points are found when they are arranged in increasing order.
Weight line data = 60, 70, 78, 82, 98.
=> The lower quartile for the box-and whisker plot = Weight 70.
Question 2.
What is the range for this box-and-whisker plot?
Answer:
The range for this box-and-whisker plot = 38.
Explanation:
The range of a box plot is the difference between the maximum and minimum value.
=> Highest value = 60.
Lowest value = 22.
Range of this box-and-whisker plot = Highest value – Lowest value
= 60 – 22
= 38.
Question 3.
Create a box-and whisker plot from this information.
Answer:
A box-and whisker plot from this information:
Explanation:
Median = 12.
Lower Quartile = 8.5.
Upper Quartile = 14.
Lower Extreme = 5.
Upper Extreme = 20.
Question 4.
What is the range and median of this box-and-whisker plot?
Range _____________
Median ____________
Answer:
Range = 40.
Median = 75.
Explanation:
Highest value = 90.
Lowest value = 50.
Range of this box-and-whisker plot = Highest value – Lowest value
= 90 – 50
= 40.
The median is the middle number in the data set.
Median of this box-and-whisker plot = 75.