This document defines key vocabulary terms from the MCA-III Math test specifications, including: - Probability is a number from 0 to 1 that shows the likelihood of an event happening. - A ratio shows the relative sizes of two or more values. - An outcome is the result of something. - Frequency is the number of times a value occurs in a set of data. - A prediction is a guess about what will happen.

1. MCA-III Math Vocabulary from DRAFT Test SpecificationsBy J. Scheumann and C. Sorenson 2011Source: MCA III DRAFT Test Specifications for Mathematics, Oct. 15, 2001, http://children.state.mn.us (Assessment and Testing/MCAs/Test Specs)

2. Data Analysis and Probability 6th grade Math Vocabulary MCA

3. probabilityThe teacher puts 7 blue squares and 2 red squares in the box.If you pull a square out of the box. What will probably be the color?Can you pull out a purple square?A number from 0 to 1 that shows the likelihood that an event will happen.By J. Scheumann and C. Sorenson 2011

4. probabilityA number from 0 to 1 that indicated the likelihood that something (an event) will happen.By J. Scheumann and C. Sorenson 2011

5. ratio1:3 (for every one boy there are 3 girls)1/4 are boys and 3/4 are girls0.25 are boys (by dividing 1 by 4)25% are boys (0.25 as a percentage) A ratio shows the relative sizes of two or more values.By J. Scheumann and C. Sorenson 2011

6. outcomeHead and tails are two outcomes from flipping a coin.The result of something.By J. Scheumann and C. Sorenson 2011

7. frequencyThe number of times a value occurs in a set of data.By J. Scheumann and C. Sorenson 2011

8. frequency graphA graph showing how often each value in a data set occurs.By J. Scheumann and C. Sorenson 2011

9. frequency tableA chart on which data is tallied to find the frequency of given events or values.By J. Scheumann and C. Sorenson 2011

10. relative frequencyAll the Relative Frequencies add up to 1 (except for any rounding error).By J. Scheumann and C. Sorenson 2011

11. predictOutcomes are the results of an experiment or trial. Using outcomes, it is possible to make predictions. A prediction is a guess about what will happen. By J. Scheumann and C. Sorenson 2011

12. likely/unlikelyhttp://www.mathsisfun.com/activity/dice-experiment-1.htmlIn mathematics, likely is having a greater than 50 % chance of happening. Unlikely is have less than 50% chance of happening. By J. Scheumann and C. Sorenson 2011

13. certain/uncertaincertainIn mathematics, if an outcome is certain, the chances are 100%.By J. Scheumann and C. Sorenson 2011

14. tree diagramA chart that is used to show possible outcomes.By J. Scheumann and C. Sorenson 2011

15. eventA happening or occurrence.By J. Scheumann and C. Sorenson 2011

16. random samplingTaking a sampling from the population in a manner that allows all members the same chance of being included.By J. Scheumann and C. Sorenson 2011

17. theoreticalThe probability based on known facts or characteristics. This is what should happen in an experiment. By J. Scheumann and C. Sorenson 2011

18. experimentalThe probability based on the outcomes obtained by conducting an experiment. By J. Scheumann and C. Sorenson 2011

19. sampleA subset of a population used to represent the whole population.By J. Scheumann and C. Sorenson 2011

20. combinationsCombinations pop up in ordinary life all the time. When you need to find out all the possible combinations of something, an organized list is the way to go. By J. Scheumann and C. Sorenson 2011