Statistics - 1

Last update by thatslolowithanl on 02/16/2010
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4 STEPS TO HYPOTHESIS TESTING

Answer:


1. State the Hypotheses: Null vs. Alternative

2. Formulate an Analysis Plan: describes how to use sample data to reject or accept null hypothesis, based on test statistic.

3. Analyze Sample Data: Find the value of the test statistic (mean score, proportion, t-score, z-score, etc.) described in the analysis plan. Complete other computations, as required by the plan.

4. Interpret Results: does test statistic support or reject null hypothesis?

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    MODEMEDIAN
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    SAMPLE MEAN (equation)
    Sample mean =

    x = ( Σ xi ) / n
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    SAMPLE STANDARD DEVIATION (equation)
    Sample standard deviation =

    s = sqrt [ Σ ( xi - x )2 / ( n - 1 ) ]
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    SAMPLE VARIANCE (equation)
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    s2 = Σ ( xi - x )2 / ( n - 1 )
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    N
    N = number of values for X
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    N



    N = number of values for X
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    x

    X=data setfor a population(all numbers in the set)

    uppercase X= population