A study of 45 members of the Mall Walkers group showed that they could walk at an average rate of 3.3 miles per hour. A previous study showed that the standard deviation is 1.0 miles per hour. Make a 90% conﬁdence interval statement for the mean walking speed for all members.I am 90% confident that the mean walking speed for mall walkers is between 0.19084 mph and 1.8092 mph.I am 90% confident that the mean walking speed for mall walkers is between 3.0548 mph and 3.5452 mph.I am 90% confident that the mean walking speed for mall walkers is between 3.0495 mph and 3.5505 mph.I am 90% confident that the mean walking speed for mall walkers is between 0.17344 mph and 1.9266 mph.

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Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section: Chapter Questions

Problem 22SGR

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A study of 45 members of the Mall Walkers group showed that they could walk at an average rate of 3.3 miles per hour. A previous study showed that the standard deviation is 1.0 miles per hour. Make a 90% conﬁdence interval statement for the mean walking speed for all members.

I am 90% confident that the mean walking speed for mall walkers is between 0.19084 mph and 1.8092 mph.
I am 90% confident that the mean walking speed for mall walkers is between 3.0548 mph and 3.5452 mph.
I am 90% confident that the mean walking speed for mall walkers is between 3.0495 mph and 3.5505 mph.
I am 90% confident that the mean walking speed for mall walkers is between 0.17344 mph and 1.9266 mph.

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