Psychological Statistics Exam 2

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Author:
mfuzz81
ID:
262113
Filename:
Psychological Statistics Exam 2
Updated:
2014-02-15 13:50:08
Tags:
stats
Folders:
statistics
Description:
Chapters 5-8 of Essentials of Statistics for the Behavioral Sciences
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  1. Define a z-score
    A z-score specifies the precise location of each  value within a distribution. The sign of the z-score (+ or −) signifies whether the score is above the mean (positive) or below the mean (negative). The numerical value of the z-score specifies the distance from the mean by counting the number of standard deviations between  and μ
  2. What is a raw score?
    The actual measurement; i.e. the value of X
  3. What is the formula to transfer a raw score into a z-score?
    • Z= X- µ
    •        σ
  4. What does the numerator for the z score mean? In other words, what is it?
    Its actually the deviation score
  5. Why do you divide by the standard deviation?
    To put the units into standard units (standard deviations)
  6. If you have the z-score and standard deviation, can you calculate the raw score?
    Yes

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