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Parallel Slope Test Using a Single Regression Model

PARALLEL SLOPE TEST USING A SINGLE REGRESSION MODEL [Pg.370]

The test for parallel slopes also can be easily performed using indicator variables. Using the same model again, [Pg.370]

Let us test the parallel hypothesis, using the six-step procedure. [Pg.371]

Hq Slopes are the same for microbial data for both products = 63 = 0, Ha. Slopes are not the same = 63 0. [Pg.371]

Step 3 Write out the test statistic. For unequal slopes, the formula is [Pg.371]

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Parallel testing

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Slope

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