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Probability and Statistics
Lesson 17		 Data Organization and Analysis
  Objectives/Vocab/Tips > Examples 1 | 2 | 3 | 4 > Practice: 1 | 2 | 3 | 4 > Reflection

ALPObjective:

Data Organization and Analysis

In this lesson you will organize and display data in appropriate forms and calculate and appropriately use range and measures of central tendency to describe data.

Vocabulary:

If you need to check a word's definition, please go to the glossary by clicking the Vocabulary button
  • axis
  • mean
  • median
  • mode
  • random
  • pattern
  • scale
  • plat
  • statistics
  • survey
  • trend

Tips to Remember:

Mean

The mean or average of a group of numbers is their sum divided by the number of numbers in the group. For example:

  • 5,8,9,2,6
  • 5 + 8 + 9 + 2 + 6 = 30
  • 30/5 = 6

The mean of this group of numbers is 6.
Mode

The mode of a group of numbers or objects is the object that appears most often within the group. For example:

  • 3,7,1,4,3,8,2

The mode of this group of numbers is 3 as it appears twice compared to the other numbers appearing only once.
Median
The median of a group of numbers is the middle number if the list of numbers were in numerical order. To find the median of a group of numbers, arrange the numbers in numerical order and find the middle number. If there is an even number of numbers in the group, you will need to find the mean of the middle two numbers. If there is an odd number of numbers in the group, you will use the middle number of the group.
Range

The range of a group of numbers is the difference of the highest and lowest numbers in the group. For example:

  • 3,9,1,5,4,2

The highest number is 9, the lowest number is 1, therefore you take the difference of those two numbers.

  • 9 - 1 = 8

The range of the group of numbers is 8.
Making Graphs

Visit the following to create your own graphs and to see the different parts required to build the different graphs.
Kinds of Graphs

To view examples of these graphs visit the following link:
Scatter Plot (Scattergram)
A scatter plot or scattergram is a graph of a set of points. By looking at all of the points, you may be able to analyze the information to make predictions.
Stem and Leaf Plots
This is a display of a collection of numbers in which the digits in certain place values are designated as the stems and digits in lower place values are designated as the leaves and placed side-by-side next to the stems.

Example 1 >>

 

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