Researchers were interested in the short-term effect that caffeine has on heart rate. They enlisted a group
Question:
(a) Use these data to construct a 90% confidence interval for the difference in mean effect that caffeinated coffee has on heart rate, in comparison to decaffeinated coffee.
(b) Using the interval computed in part (a) to justify your answer, is it reasonable to believe that caffeine may not affect heart rates?
(c) Using the interval computed in part (a) to justify your answer, is it reasonable to believe that caffeine may affect heart rates? If so, by how much?
(d) Are your answers to (b) and (c) contradictory? Explain.
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a Let 1 denote caffeine and let 2 denote decaf SE 1 2 37 2 34 2 502 73 59 1740502 using ...View the full answer
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Related Book For 
Statistics For The Life Sciences
ISBN: 9780321989581
5th Edition
Authors: Myra Samuels, Jeffrey Witmer, Andrew Schaffner
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