7.1-11 [128.77, 135.23]. 7.1-11. The heart rates (in beats per minute) of 41 ran-domly selected finishers of the Chicago Marathon, fiveminutes after they completed the race, had sample mean= 132 and sample variance s² = 105. Assuming thatthe heart rates of all finishers of the Chicago Marathonfive minutes after completing the race are normally dis-tributed, obtain a 95% confidence interval for their mean.

7.1-11. The heart rates (in beats per minute) of 41 ran- domly selected finishers of the Chicago Marathon, five minutes after they completed the race, had sample mean = 132 and sample variance s2 = 105. Assuming that the heart rates of all finishers of the Chicago Marathon five minutes after completing the race are normally dis-

7.1-11. The heart rates (in beats per minute) of 41 ran- domly selected finishers of the Chicago Marathon, five minutes after they completed the race, had sample mean = 132 and sample variance s2 = 105. Assuming that the heart rates of all finishers of the Chicago Marathon five minutes after completing the race are normally dis-

Algebra & Trigonometry with Analytic Geometry

13th Edition

ISBN:9781133382119

Author:Swokowski

Publisher:Swokowski

Chapter4: Polynomial And Rational Functions

Section4.3: Zeros Of Polynomials

Problem 54E

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