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Statistics Notecard Ch 11

# Statistics Notecard Ch 11 - AP STAT CH 11 A null hypothesis...

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AP STAT CH 11 A null hypothesis is a statement being tested in a significance test, statement of ‘no effect’ ‘no difference’ or no change from historical values. The claim about the population we are trying to find evidence for is the alternative hypothesis. a significance test uses data in the form of a test statistic= (estimate-hypothesized value/ st dev of estimate) here are the principles- based on a statistic that compares the values of a parameter as stated in Ho with estimate of the sample data, values of the estimate far from the parameter value in the direction specified by the Ha give evidence against Ho.Measures how much the sample data diverge from Ho. P value is probability computed assuming Ho is true that the observed outcome would take a value as extreme or more extreme that that actually observed. Smaller p value, stronger evidence against Ho. Significance level is decisive value of P, require data give evidence against Ho . Significant= smaller than α . Means simply not likely to happen by chance. Reject Null

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Statistics Notecard Ch 11 - AP STAT CH 11 A null hypothesis...

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