14 & 16

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Across
  1. 2. a type of distribution that that impose order on raw data
  2. 3. instruments ability to identify noncases correctly
  3. 4. refers to the number of peaks
  4. 6. all instruments measuring the same attribute
  5. 7. involves assigning numbers to objects to represent the amount of an attribute
  6. 9. a common method of displaying frequency information graphically
  7. 11. distance between the highest and the lowest points
  8. 12. is the arithmetic average of all scores
  9. 13. a statistic used when a small number of categories is desired
  10. 15. one of two primary criteria of assessing an instrument
  11. 18. is the point above which and below which 50% of the cases fall
  12. 20. the degree to which an instrument measures what it is suppose to measure
  13. 21. how spread out the data are
Down
  1. 1. bond between two variables with interrelated variation
  2. 5. ability to differentiate the construct being measured from others
  3. 8. statistics that enables researchers to summarize and and describe quantitative data
  4. 10. extent to which an instrument yields the same results as repeated administrations
  5. 14. instrument's ability to identify a case correctly
  6. 16. a descriptive statistic that describes relationship between two variables
  7. 17. is the value that occurs most frequently
  8. 19. distribution that has two mirror image halves