The accompanying table summarizes successes and failures when subjects used different methods when trying to stop smoking. The determination of smoking or not smoking was made five months after the treatment was begun, and the data are based on results from the Centers for Disease Control and Prevention. If we test the claim that success is independent of the method used, the TI-83/84 Plus calculator provides a T-value of 0.216 (rounded). What does the T-value tell us about that claim?
Answer to relevant QuestionsThe table in Exercise 1 is called a contingency table or two-way table. Why is the term contingency used? Why is the terminology of two-way table used? The U.S. Supreme Court considered a case involving the exam for firefighter lieutenant in the city of New Haven, Connecticut. Results from the exam are shown in the table below. Is there sufficient evidence to support the ...In a clinical trial of the effectiveness of echinacea for preventing colds, the results in the table below were obtained. Use a 0.05 significance level to test the claim that getting a cold is independent of the treatment ...The table below lists auto fatalities by day of the week for a recent year. Minitab results are also shown. Use a 0.01 significance level to test the claim that auto fatalities occur on the different days of the week with ...Use the sample of ages from Exercise 3 to construct a 95% confidence interval estimate of the mean age of the population of ICU patients. Do the confidence interval limits contain the value of 65.0 years that was found from ...
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