stat test 3

# stat test 3 - Hypothesis testing-procedure for testing a...

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Hypothesis testing-procedure for testing a claim about the value of a parameter Level of significance= Power= Trade-off between Three ways to increase power. Increase , decrease variability, increase n Test statistic- standardized version of the obtained data. Critical region- range of values of test statistic for which we reject Ho Critical value- boundary point of this range Statistically significant- test in which we reject Ho p-value- smallest level of significance for which we would reject Ho Sample correlation coefficient- r, is measure of degree of linear relationship b/t two variables in the sample Population correlation coefficient-p, is measure of degree of linear relationship b/t two variables in the population -Accept Ho unless evidence convinces us its false -Draw picture according to Ho, locate critical region according to H1 -If we reject Ho in a two0tail test, our conclusion must indicate the direction of the result -The smaller the p-value, the more sure we are that Ho is wrong -Ignore the sign of t when finding bounds on the p-value -Ho and H1 never depend on the value of X bar - Ask yourself: one tail or 2? =.05 or =.01? given values or S values? Given std. deviations or variances?

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