Data Around US

Statistical Analysis Tool

Directions:

The software will automatically open in another window. If the tool does not run or you see a blank window or window with text information, then you need to update your Java software to include the Java Web Start capabilities. See the browser help file for guidance.

Select an image or shape to analyze. Use the following tools and options to analyze the area and perimeter of your object.

BOX PLOT: A window will open with the names of available columns. Select one or more columns to show the corresponding box plot in a separate window.
HISTOGRAM: A window will open with the names of available columns. Select one or more columns to show the corresponding histograms in a separate window.
SCATTERPLOT: A window will open with the names of available columns. Select one column for the independent and one column for the dependent variables. The scatter plot will be produced in a separate window.
MATRIX PLOT: A window will open with the names of available columns. Select two or more columns to simultaneously see all possible scatter plots.
PLOT MEANS: Withing a plot window, this button will draw a horizontal line representing mean of the dependent data, and vertical line representing mean of the independent data. Where the lines intersect is .
DRAW LINE: An arbitrary line will appear. You can move the end points to change the slope of the line or use the middle point to slide the line without changing the slope.
SHOW ERRORS: The vertical distance (residual) to either the line drawn or to the line of best fit will be shown.
SHOW SQUARED ERRORS: Squares representing the error for each data point squared are drawn. Typically you want to minimize these errors. At the right is shown the total sum of these squares.
LINE OF BEST FIT: This button shows the 'line of best fit' or the linear regression line for the data.
CORRELATION: At the right you will be given options for the correlation - how big and spread out is the cloud of the data or alternatively, how well is this data fitted by a line. Zero means there is little correlation and data is spread out randomly from the mean. A correlation near 1 means the data is fitted well by a line with positive slope. A correlation near –1 means the data is fitted well by a line with negative slope.

Other menu options will allow you to open your own image stored on your computer, to print the current window, hide/show the history window, to set the horizontal and vertical scales for the image, and to exit the program.

© 2006 Applet written by S. Keller, Department of Mathematics, Michigan State University

 
© 2006 Connected Mathematics Project, Michigan State University and Pearson
Education, Inc. publishing as Pearson Prentice Hall