Flashcards
Research Basics - Data Collection
Cards in this deck (8)
- 1DESCRIPTIVE STATISTICS- Describe the general characteristics of a set or distribution of scores.
- 2MEASURES OF CENTRAL TENDENCY- an average; an individual value that is most representative of that distribution or set of scores
- 3THREE MEASURES OF CENTRAL TENDENCY1) mean - the sum of a set of scores divided by the number of scores
- used for interval/ratio measurements
2) median - the score or point in a distribution above which one half of the scores lie.
- used for ordinal measurements
3) mode - the score that occurs most frequently
- used for nominal measurements - 4MEASURES OF VARIABILITY1) The Range - the difference between the highest and lowest scores
2) Standard Deviation - the average amount that each of the individual scores varies from the mean of the set of scores - 5STANDARD DEVIATION EQUATIONS =
- 6NORMAL CURVE PERCENTAGE OF DISTRIBUTION2% - 14% - 34% - 34% - 14% - 2%
- 7STANDARD SCORE- Scores that have the same reference point and the same SD
- Most common is the z-score - 8Z-SCOREThe result of dividing the amount that an individual score deviates from the mean by the standard deviation
- A raw score above the mean will have a positive z score
- A raw score below the mean will have a negative z-score
- A raw score equal to the mean will have a z-score of zero
- z-score = 1; one SD above mean
- z-score = -1; one SD below mean
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- Flashcards on Research Basics - Data Collection, created by Rachel Vince on 25/02/2017.
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- Rachel Vince
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