LEC 13 - COORELATIONS

# LEC 13 - COORELATIONS - SHOWTIME! STATISTICAL TOOLS IN...

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SHOWTIME!

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STATISTICAL TOOLS IN EVALUATION CORRELATION TECHNIQUE SIMPLE PREDICTION TESTS OF DIFFERENCE
DETERMINING RELATIONSHIPS BETWEEN SCORES • MANY SITUTATIONS WHERE ONE MAY WANT TO KNOW THE RELATIONSHIP BETWEEN: • SCORES ON TWO SIMILAR TESTS (I.E., RELIABILITY MEASURE) • OR TWO DIFFERENT TESTS (AMOUNT OF SHARED VARIANCE OR INFORMATION OF TWO TESTS) “if there are seven tests in a battery of tests and two of the tests are highly related, the battery could be reduced to six tests with no loss of information”

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DETERMINING RELATIONSHIPS BETWEEN SCORES - GRAPHING TECHNIQUE • PLOTTING OF THE SCORES FOR TWO TESTS OF EACH INDIVIDUAL IN A GRAPH • THE CLOSER ALL PLOTTED POINTS ARE TO THE TREND LINE, THE HIGHER OR LARGER THE RELATIONSHIP • WHEN THE PLOTTED POINTS RESEMBLE A CIRCLE MAKING IT IMPOSSIBLE TO DRAW A TREND LINE, THERE IS NO LINEAR RELATIONSHIP BETWEEN THE TWO MEASURES BEING GRAPHED
DETERMINING RELATIONSHIPS BETWEEN SCORES - GRAPHING TECHNIQUE

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DETERMINING RELATIONSHIPS BETWEEN SCORES - GRAPHING TECHNIQUE
DETERMINING RELATIONSHIPS BETWEEN SCORES - GRAPHING TECHNIQUE

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DETERMINING RELATIONSHIPS BETWEEN SCORES - GRAPHING TECHNIQUE OF A LARGE DATA BASES USING A COMPUTER
DETERMINING RELATIONSHIPS BETWEEN SCORES - GRAPHING TECHNIQUE OF A LARGE DATA BASES USING A COMPUTER

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## This note was uploaded on 09/08/2010 for the course KIN 175 at San Jose State University .

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LEC 13 - COORELATIONS - SHOWTIME! STATISTICAL TOOLS IN...

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