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Levels of Measurement
Populations and Samples
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05 level alpha level analysis of variance arithmetic average between-groups calculated value central tendency chapter class interval comparison value computed conﬁdence correlated samples correlation coefficient critical value cumulative frequency degrees of freedom dependent variable determine effect estimate example expected frequency experimental conditions F ratio factor ﬁnd ﬁrst formula frequency distribution hypothesis testing independent samples inferential statistics known level of measurement mean square measure of central median mode nominal normal curve normal distribution notation null hypothesis number of subjects one-way analysis parametric tests percentage population variance prediction procedure random sample randomly rank raw score regression line relationship between variables repeated measures research hypothesis sample statistic sample test sampling error scale of measurement scattergram signiﬁcance skewed standard deviation statistical technique sum of squares supervisors symbol Test the hypothesis tests of significance total number two-tail test type I error typing test value of F within-groups Z score