Term
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Definition
| PRESUMED TO EFFECT THE DEPENDENT VARIABLE; Experimental, Predictor, Causal, Manipulated & Explanatory |
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Term
TYPES OF DATA
DATA: VALUES IN A POPULATION OR SAMPLE
DATUM: A SINGLE VALUE IN A POPULATION OR SAMPLE |
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Definition
NORMINAL DATA: CAN BE GROUPED; EX. MALE OR FEMALE
ORDINAL DATA:CAN BE RANKED; EX. LIKERT SCALE
INTERVAL DATA: EQUALLY SPACED; EX. BLOOD PRESSURE
RATIO DATA: COMPARISON MAKES SENSE; EX. HALF OF SOMETHING |
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Term
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Definition
INDEPENDENT(X): Presumed Cause
DEPENDENT(Y): The Outcome Being Measured
CONFOUNDING: Other Things that may Influence or Confuse the Relationship |
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Term
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Definition
| IS ABOUT USING NUMBERS TO DESCRIBE AND/OR PREDICT PHENOMENA. |
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Term
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Definition
DESCRIPTIVE STATISTICS: USED TO DESCRIBE A GROUP
INFERENTIAL STATISTICS: DESCRIBES A PART TO INFER FACTS ABOUT THE WHOLE |
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Term
| POPULATION, SAMPLE & RANDOM |
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Definition
POPULATION: EVERY ITEM IN A GROUP OF INTEREST
SAMPLE: A PART (SUBSET) OF A POPULATION
RANDOM: EVERY ITEM HAS AN EQUAL CHANCE OF BEING CHOSEN |
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Term
| MEASURES OF CENTRAL TENDENCY |
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Definition
MEAN: NUMERICAL AVERAGE (u=mu-Population; x=x bar-Sample.
MEDIAN: ONE IN THE MIDDLE
MODE: MOST COMMON |
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Term
NOMINAL DATA
SOUNDS LIKE NAME
POSSIBLE MEASURES: MODE, MODAL PERCENTAGE, RANGE & FREQUENCY DISTRIBUTION |
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Definition
-LOWEST LEVEL OF MEASUREMENT
-DISCRETE CATEGORIES
-NO NATURAL ORDER
-MAY BE REFERRED TO A QUALITATIVE OR CATEGORICAL
-CATEGORICAL; EX. MARITAL STATUS, RELIGION
-DICHOTOMOUS; EX. FEMALE OR MALE |
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Term
ORDINAL
POSSIBLE MEASURES: ALL NOMINAL LEVEL TESTS, MEDIAN, PERCENTILE, SEMIQUARTILE RANGE, RANK ORDER COEFFIECIENTS OF CORRELATION |
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Definition
-RELATIVE RANKINGS
-UNKNOWN DISTANCE BETWEEN RANKINGS
-ZERO IS ARBITRARY
EX. LIKERT SCALES, SOCIOECONOMIC STATUS, SIZE-small, medium, large; SIZE, RANKING OF FAVORITE SPORTS, CLASS RANKINGS, WELLNESS RANKINGS |
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