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alternative hypothesis Applying the concepts assume assumptions B₁ B₁x₁ B₂ binomial brand calculate Chapter coefficient completely randomized design confidence interval data provide sufficient data set degrees of freedom determine discrete random variable drug equal error evidence to indicate example F statistic Find a 90 Find the probability frequency histogram graph independent variables inferences Learning the mechanics least squares least squares line mean number measurements median Minitab n₁ n₂ normally distributed null hypothesis observed significance level P₁ P₂ parameters population mean prediction interval printout probability distribution proportion provide sufficient evidence random sample random variable randomly selected rank sum regression model Rejection region sample mean sample statistic sampling distribution shown in Figure simple events standard deviation SUM OF SQUARES Suppose Test statistic test the null variance X₁ z-score