Box and Whisker Plots

Objective: You will be able toFind the mean, median, mode of a set of dataUnderstand the difference between formsUse data to identify box and whisker plotsBox and Whisker Plots

Box-and-Whisker Plot PracticeThere are 12 people are in a Habanera Pepper eating contest who ate the following amount of peppers: 4, 4, 4, 9, 15, 2, 5, 0, 10, 12, 1, 18

Put the numbers in order from least to greatest:

0, 1, 2, 4, 4, 4, 5, 9, 10, 12, 15, 18

BELOW THE MEDIAN (4.5)ABOVE THE MEDIAN (4.5)Discussion Question:Why are all of the Boxes and Whiskers different sizes? Analyzing a Box-and-Whisker Plot_____%_____%_____%_____%25%25%25%25%50%50%Box-and-Whisker Plot Reflection Question Nate believes that the reason that the boxes and whiskers are not always the same size is because there are more numbers in some of the boxes than others. Is he correct? Explain.Example using Percents

The box and Whisker plot shows that math grades of 100 students.What percent of the grades are between 68 and 78?

What is the Lower Extreme?

What is the Interquartile Range?

What percent of students scored above 78?

Which is true?Half of the grades are below 78Half of the grades are between 68 and 78The average grade is 78There were more grades between 78 and 86 than between 67 and 68

Example Stem and Leaf Plot

Stem and Leaf Plots-a way of displaying numbers

Rewrite the numbers from least to greatest

Order: 12 , 13 ,Lower Extreme:Lower Quartile:Median:Upper Quartile:Upper Extreme:Range:IQR:

You TRY!Order: Lower Extreme:Lower Quartile:Median:Upper Quartile:Upper Extreme:Range:IQR:

Example 1

Example 2The are 11 people at a school with their monthly salaries displayed below:

Exactly 2 people earn $5,000 or more each monthExactly 5 people earn less than $5,000 each monthExactly 5 people earn $4,000 or less each monthExactly 6 people earn $4,000 or more each month

Example 3The are 8 people at a school with their monthly salaries displayed below:

Exactly 4 people earn $5,000 or more each monthExactly 5 people earn less than $5,000 each monthExactly 4 people earn $4,000 or less each monthExactly 5 people earn $4,000 or more each month

Example 4Colby graphed some data as shown in this box-and-whisker plot.

Which statement is true about Colbys data?The range of the data is 25.Half of the data is below 65.The median of the data is 60.Three-fourths of the data is below 90.Bellwork: Thursday