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Flashcards

7. Statistics - Simple Statistics

Patrick Bodenhausen Inglês 56 flashcards

Flashcards do conjunto (56)

  1. 1Summarize and organize raw scores.Data Tables
  2. 2Allow the teacher to look at all of the scores at one time before rearranging the data for a more complete picture.Data Tables
  3. 3The first stop in a progression of statistical steps that illuminate additional insights.Data Tables
  4. 4Scores are ranked by a particular value or for a special purpose.Ordered Array
  5. 5Contains all of the information in the simple data table but also provides the data in a more user-friendly and useful format.Ordered Array
  6. 6i.e. ranking scores from highest to lowest.Ordered Array
  7. 7What is the significance of the Ordered Array?a) The teacher can quickly determine who did well and which students need extra help.
    b) Organizing the data in a particular way allows the teacher to easily use quantified attributes of the class to make instructional decisions.
  8. 8Good tool for determining the high and low scores, as well as the range of student scores.Ordered Array
  9. 9Provides additional information that places the range into perspective.Ordered Array
  10. 10The distance between the highest and lowest score.Range
  11. 11Useful statistic for the teacher because it assists in identifying the level of achievement in the class.Range
  12. 12Means that the students performed at about the same level.Low Range
  13. 13Indicates that the instruction was received equally well by all students.Low Range
  14. 14Indicates a greater degree of variability.Middle Range
  15. 15Often the most difficult for the teacher because no clear-cut message can be derived from the data.Middle Range
  16. 16Indicates that the class achievement varied considerably.High Range
  17. 17Why might Range statistics be deceiving?It only accounts for the highest and lowest scores.
    I.e. The entire class scores a 99 and only one student scores a 12 vs. only one student scores a 99 and the remainder of the class scores a 12.
  18. 18Divide the ordered data into 100 separate units.Percentiles
  19. 19A ________ is the value or score on the ordered array of data that indicates the percentage of the scores that fall at or below that value.percentile
  20. 20What does it mean if the 25th percentile of a certain assessment is a score of 39?It means that 25% of the scores from that assessment fall below 39.
  21. 2125th percentile =the first quartile
  22. 2250th percentile =the median
  23. 2399th percentile =no scores are above it
  24. 24The ________ ________ for a given raw score is the percentage of students that scored less than or equal to that raw score.Percentile Rank
  25. 25Used to interpret an individual's raw score by comparing it with the scores of other students.Percentile Rank
  26. 26What does it mean if a student earned a raw score of 77 and that score translated to a percentile rank of 89?It means that 89% of the students in that population received a score of 77 or less.
  27. 27Results of high stakes tests are often reported in terms of what?percentile rank
  28. 28Any of the three values which divide the sorted data set into four equal parts so that each part represents 1/4 of the population.Quartiles
  29. 29That point on the ordered array where 75% of the scores are above it and 25% of the scores are below it.First Quartile
  30. 30"Q1"First Quartile
  31. 31"lower quartile"First Quartile
  32. 32"25th percentile"First Quartile
  33. 33The midpoint of the data where 50% of the scores are above and 50% are below.Second Quartile
  34. 34"Q2"Second Quartile
  35. 35"the median"Second Quartile
  36. 36"50th percentile"Second Quartile
  37. 37Establishes the point where 25% of the scores are located above it and 75% below it.Third Quartile
  38. 38"Q3"Third Quartile
  39. 39The difference between the upper and lower quartiles.Interquartile Range (IQR)
  40. 40Often used to characterize the bulk of the population.Interquartile Range (IQR)
  41. 41Indicates how many students scored at the same level.Frequency Distribution
  42. 42I.e. It tells how many students received a score of 92.Frequency Distribution
  43. 43Clumps like scores together.Frequency Distribution
  44. 44Overlay the results of multiple assessments on the same frequency distribution.Multiple Frequency Distributions
  45. 45What does the addition of more frequency distributions help do?Helps distinguish different trends in the data.
  46. 46The most commonly used graph to show frequency distributions.Histogram
  47. 47A graphical representation of frequency distributions.Histogram
  48. 48In the case of student scores, a ________ shows the frequency of student scores in an easy-to-read, illustrative format.histogram
  49. 49What is the drawback to histograms?The lack of actual student data - results displayed are not as specific as the data displayed on a frequency distribution table.
  50. 50Designed to show trends in similar data."Double" or "Triple Barreled" Histogram
  51. 51The graphic representation of a normal distribution of data.The Normal Curve
  52. 52Should a teacher expect the results of every exam to reflect the normal curve when graphed? Why?No. The normal curve is based on a large population and assumes a normal distribution of data.
  53. 53A ________ that is not "normal" may influence data to produce something other than a normal curve.population
  54. 54Data is considered ________ if it does not form a normal curve when graphed.skewed
  55. 55Data is graphed predominantly to the right of the midpoint.Negatively Skewed
  56. 56Data is graphed predominantly to the left of the midpoint.Positively Skewed

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FlashCards sobre 7. Statistics - Simple Statistics, criado por Patrick Bodenhausen em 02-10-2019.
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