Module 3

5. statistical measure of the average variation from the mean score
8. the tendency of a test to produce the same scores again and again each time
10. table/graph that shows how often different numbers or scores appear in a particular set of scores
13. graph showing a frequency distribution
14. referring to differences in data sets that are larger than chance variation would predict
17. statistical analysis of two+ sets of data to reduce the possibility of error

1. difference between the high and low scores
2. organizing numbers and summarizing them so that patterns can be determined
3. measurement of the degree of differences within a distribution or how scores are spread out
4. line graph showing a frequency distribution
6. the degree to which a test actually measures what it is suppose to
7. alternate name for the normal curve
9. average score
11. special frequency polygon in which the scores are symmetrically around the mean, median, and mode
12. branch of mathematics concerned with the collection and interpretation of data
15. the most frequent score
16. the middle score