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Populations and Samples
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a z score analysis of variance appropriate statistical test assume assumptions base period basis binomial probability table central limit theorem column completed this chapter compute conﬁdence interval conﬁdence level control chart correlation coefﬁcient critical region degrees of freedom difference scores establish a conﬁdence example F ratio ﬁg ﬁgures ﬁnd ﬁve following data frequency distribution graph groups sum groups variance estimate large number large samples linked relative machine measure median month moving average normally distributed Null hypothesis Alternative number of samples obtain ofthe Outline an appropriate parameter percentage population distribution predicted frequencies random sample reﬂect regression equation reject the null relationship researcher results signiﬁcant review problems sample mean sampling distribution scattergram Seeframes selected skewed square root standard deviation sum of squares theoretical sampling theory Total Type II error variability