Refer to the association you investigated in Exercises 12.7 and 12.21 between study time and college GPA. Using software with the data file you constructed, conduct a significance test of the hypothesis of independence, for the one-sided alternative of a positive population slope. Report the hypotheses, appropriate assumptions, sample slope, its standard error, the test statistic, the P-value, and interpret.
Answer to relevant QuestionsRefer to the association you investigated in Exercises 12.8 and 12.22 between skipping class and college GPA. Using software with the data file you constructed, construct a 90% confidence interval for the slope in the ...The House Selling Prices FL data file on the text CD has several predictors of house selling prices. The table here shows the ANOVA table for a regression analysis of y = the selling price (in thousands of dollars) and x = ...For prediction intervals, an important inference assumption is a constant residual standard deviation of y values at different x values. In practice, the residual standard deviation often tends to be larger when μy is ...Let y = number of parties attended in the past month and x = number of dates in the past month, measured for all single students at your school. Explain the mean and variability aspects of the regression model μy = α + ...Refer to the previous exercise. a. Explain what the regression parameter β means in this context. b. Construct and interpret a 95% confidence interval for β. c. Use the result of part b to form a 95% confidence interval ...
Post your question