This is not the document you are looking for? Use the search form below to find more!

Report home > Education

Box and Whisker Graphs

0.00 (0 votes)
Document Description
Statistics assumes that your data points (the numbers in your list) are clustered around some central value. The "box" in the box-and-whisker plot contains, and thereby highlights, the middle half of these data points. To create a box-and-whisker plot, you start by ordering your data (putting the values in numerical order), if they aren't ordered already. Then you find the median of your data. The median divides the data into two halves. To divide the data into quarters, you then find the medians of these two halves. Note: If you have an even number of values, so the first median was the average of the two middle values, then you include the middle values in your sub-median computations.
File Details
  • Added: June, 19th 2012
  • Reads: 185
  • Downloads: 0
  • File size: 261.07kb
  • Pages: 4
  • Tags: box and whisker graphs, deviation and z score worksheet, straight lines, the unit circle, tsa of pyramids worksheet
  • content preview
Submitter
Embed Code:

Add New Comment




Related Documents

Box and Whisker Plots

by: vistateam123, 4 pages

We generally come across many types of the plots or the diagrams or the graphs while studying the math in the context of the descriptive type of the statistics for example the stem and the leaf plot ...

Box And Whiskers Graph

by: tutorciecleteam, 4 pages

Statistics assumes that your data points (the numbers in your list) are clustered around some central value. The "box" in the box-and-whisker plot contains, and thereby highlights, the middle half of ...

Deviation And Z Score Worksheet

by: tutorciecleteam, 4 pages

1. The mean test score of students is 80 and the standard is 10, the probability that a student gets? A. Between 60 C. Less than 60 B. And 85 in the testAnd > 85 in the test D. None 2. Calculate the ...

The Unit Circle

by: tutorciecleteam, 4 pages

In mathematics, a unit circle is a circle with a radius of one. Frequently, especially in trigonometry, the unit circle is the circle of radius one centered at the origin (0, 0) in the Cartesian ...

TSA Of Pyramids Worksheet

by: tutorciecleteam, 4 pages

In mathematics, a unit circle is a circle with a radius of one. Frequently, especially in trigonometry, the unit circle is the circle of radius one centered at the origin (0, 0) in the Cartesian ...

Straight Lines

by: tutorciecleteam, 4 pages

Straight Lines is defined as the shortest distance between two points. A straight line is just a line which joins two points without any curve. In geometry a straight line is made by joining simple ...

How to Make a Histogram

by: tutorciecleteam, 4 pages

In mathematics, a graph is a part of geometry mathematics which is used to represent the data values in the pictorial format. The data value in the pictorial form makes the user able to easily ...

How to Make Histogram

by: tutorciecleteam, 4 pages

n mathematics, a graph is a part of geometry mathematics which is used to represent the data values in the pictorial format. The data value in the pictorial form makes the user able to easily ...

4th Grade Math

by: tutorvistateam_team, 4 pages

Fourth grade mathematics plays a role of skill builder for students who learned in 4th grade. In school fourth grade mathematics is designed to develop the skill and growth of students. In the fourth ...

Algebra Worksheets

by: tutorvistateam_team, 4 pages

Algebra Worksheets, which are online available for free must be used by the students to get the exposure to the algebra. On working with Algebra Worksheets, you will avail confidence about the ...

Content Preview
Box and Whisker Graphs
Box and Whisker Graphs
Statistics assumes that your data points (the numbers in your list) are clustered
around some central value.
The "box" in the box-and-whisker plot contains, and thereby highlights, the middle half
of these data points.
To create a box-and-whisker plot, you start by ordering your data (putting the values
in numerical order), if they aren't ordered already.
Then you find the median of your data. The median divides the data into two halves.
To divide the data into quarters, you then find the medians of these two halves.
Note: If you have an even number of values, so the first median was the average of
the two middle values, then you include the middle values in your sub-median
computations.
KnowMoreAbout:CircumferenceofCircleCalculator


Tutorcircle.com
PageNo.:1/4

If you have an odd number of values, so the first median was an actual data point,
then you do not include that value in your sub-median computations.
That is, to find the sub-medians, you're only looking at the values that haven't yet
been used.
You have three points: the first middle point (the median), and the middle points of the
two halves (what I call the "sub-medians").
These three points divide the entire data set into quarters, called "quartiles". The top
point of each quartile has a name, being a "Q" followed by the number of the quarter.
So the top point of the first quarter of the data points is "Q1", and so forth. Note that
Q1 is also the middle number for the first half of the list, Q2 is also the middle number
for the whole list, Q3 is the middle number for the second half of the list, and Q4 is the
largest value in the list.
Once you have these three points, Q1, Q2, and Q3, you have all you need in order to
draw a simple box-and-whisker plot. Here's an example of how it works.
Draw a box-and-whisker plot for the following data set:
4.3, 5.1, 3.9, 4.5, 4.4, 4.9, 5.0, 4.7, 4.1, 4.6, 4.4, 4.3, 4.8, 4.4, 4.2, 4.5, 4.4
My first step is to order the set. This gives me:
3.9, 4.1, 4.2, 4.3, 4.3, 4.4, 4.4, 4.4, 4.4, 4.5, 4.5, 4.6, 4.7, 4.8, 4.9, 5.0, 5.1
ReadMoreAbout:ComparingDecimalsCalculator


Tutorcircle.com
PageNo.:2/4

The first number I need is the median of the entire set. Since there are seventeen
values in this list, I need the ninth value:
3.9, 4.1, 4.2, 4.3, 4.3, 4.4, 4.4, 4.4, 4.4, 4.5, 4.5, 4.6, 4.7, 4.8, 4.9, 5.0, 5.1
The median is Q2 = 4.4.
The next two numbers I need are the medians of the two halves. Since I used the
"4.4" in the middle of the list, I can't re-use it, so my two remaining data sets are:
3.9, 4.1, 4.2, 4.3, 4.3, 4.4, 4.4, 4.4 and 4.5, 4.5, 4.6, 4.7, 4.8, 4.9, 5.0, 5.1
The first half has eight values, so the median is the average of the middle two:
Q1 = (4.3 + 4.3)/2 = 4.3
The median of the second half is: Copyright (c) Elizabeth Stapel 2004-2011 All Rights
Reserved
Q3 = (4.7 + 4.8)/2 = 4.75
Since my list values have one decimal place and range from 3.9 to 5.1, I won't use a
scale of, say, zero to ten, marked off by ones. Instead, I'll draw a number line from 3.5
to 5.5, and mark off by tenths.





Tut
Tu o
t rc
r i
c rc
r l
c e
l .
e c
. o
c m
Pa
P ge
g
e No
N ..::2/
3 3
/4
Now I'll mark off the minimum and maximum values, and Q1, Q2, and Q3:

ThankYouForWatching
Presentation



Document Outline

  • ﾿

Download
Box and Whisker Graphs

 

 

Your download will begin in a moment.
If it doesn't, click here to try again.

Share Box and Whisker Graphs to:

Insert your wordpress URL:

example:

http://myblog.wordpress.com/
or
http://myblog.com/

Share Box and Whisker Graphs as:

From:

To:

Share Box and Whisker Graphs.

Enter two words as shown below. If you cannot read the words, click the refresh icon.

loading

Share Box and Whisker Graphs as:

Copy html code above and paste to your web page.

loading