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The Role of Statistics
Describing Data Sets
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95 percent confidence advertising analysis ANOVA Assume binomial distribution calculate chapter coefficient of determination correlation critical value cumulative frequency customers data set Decision Rule defective degrees of freedom difference dollars employees equal estimate event example F-Distribution Figure firm forecast Formula frequency distribution frequency table given Hop Scotch hypothesis test income increase independent variables less level of confidence manager measure median Minitab moving average multicollinearity normally distributed null hypothesis number of observations output parameter percent confidence interval percent level Poisson distribution population mean population variances previous problem probability distribution production Quick Check random regression coefficient regression model reject null reject the null relationship sample means sample proportion sampling distribution sampling error selected shown Solution standard deviation standard error Statistical Interpretation sum of squares test the hypothesis tion Type variation wants yields Z-value