Question: Explain why the predictor variable is useless as a predictor
Explain why the predictor variable is useless as a predictor of the response variable if the slope of the population regression line is 0.
Answer to relevant QuestionsConsider the standardized variable a. Identify its distribution. b. Why can’t it be used as the test statistic for a hypothesis test concerning β1? c. What statistic is used? What is the distribution of that ... = 1.75 + 0.25x a. Decide, at the 10% significance level, whether the data provide sufficient evidence to conclude that x is useful for predicting y. b. Find a 90% confidence interval for the slope of the population ...Following are the data on total hours studied over 2 weeks and test score at the end of the 2 weeks from Exercise 14.21. Use α = 0.01. Presuming that the assumptions for regression inferences are met, decide at the ...The data from Exercise 14.30 for number of birdies during a tournament and final score for 63 women golfers are on the WeissStats CD. a. Decide whether you can reasonably apply the regression t-test. If so, then also do ...x = 1 a. Determine a point estimate for the conditional mean of the response variable corresponding to the specified value of the predictor variable. b. Find a 95% confidence interval for the conditional mean of the ...
Post your question