Textbook ExpertVerified Tutor
9 Nov 2021
Given information
Number of races, n = 49
Average of world-class runners, 
= 145
Standard deviation, 
= 14
Step-by-step explanation
Step 1.
Let 
be the average running times.
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Introductory Statistics
OER Edition, 2013
Openstax
ISBN: 9781938168208
Solutions
Chapter
Section
- Problem 49a
- Problem 61a
- Problem 61a
- Problem 61b
- Problem 61c
- Problem 61d
- Problem 61e
- Problem 61f
- Problem 61g
- Problem 62a
- Problem 62b
- Problem 62c
- Problem 63a
- Problem 63b
- Problem 63c
- Problem 63d
- Problem 63e
- Problem 64a
- Problem 64b
- Problem 64c
- Problem 64d
- Problem 65a
- Problem 65b
- Problem 65c
- Problem 65d
- Problem 65e
- Problem 65f
- Problem 66a
- Problem 66b
- Problem 66c
- Problem 66d
- Problem 67a
- Problem 67b
- Problem 67c
- Problem 68a
- Problem 68b
- Problem 68c
- Problem 69b
- Problem 69c
- Problem 69d
- Problem 69e
- Problem 70
- Problem 71a
- Problem 71b
- Problem 71c
- Problem 71d
- Problem 72a
- Problem 72b
- Problem 72c
- Problem 72d
- Problem 73a
- Problem 73b
- Problem 73c
- Problem 73d
- Problem 74a
- Problem 74b
- Problem 74c
- Problem 74d
- Problem 74e
- Problem 74f
- Problem 75a
- Problem 75b
- Problem 75c
- Problem 75d
- Problem 75e
- Problem 75f
- Problem 75g
- Problem 75h
- Problem 75i
- Problem 76a
- Problem 76b
- Problem 76c
- Problem 76d
- Problem 76e
- Problem 76f
- Problem 76g
- Problem 77a
- Problem 77b
- Problem 77c
- Problem 77d
- Problem 77e
- Problem 77f
- Problem 77g
- Problem 77h
- Problem 78
- Problem 79
- Problem 80
- Problem 81
- Problem 82
- Problem 83
- Problem 84
- Problem 85a
- Problem 85b
- Problem 85c
- Problem 85d
- Problem 85e
- Problem 86a
- Problem 86b
- Problem 86c
- Problem 87a
- Problem 87b
- Problem 87b
- Problem 87c
- Problem 87d
- Problem 87e
- Problem 87f
- Problem 87g
- Problem 87h
- Problem 87i
- Problem 88a
- Problem 88b
- Problem 88c
- Problem 88d
- Problem 88e
- Problem 88f
- Problem 88g
- Problem 88h
- Problem 88i
- Problem 89a
- Problem 89b
- Problem 90a
- Problem 90b
- Problem 90c
- Problem 90d
- Problem 90e
- Problem 90f
- Problem 90g
- Problem 90h
- Problem 90i
- Problem 91
- Problem 92a
- Problem 92b
- Problem 93a
- Problem 93b
- Problem 93c
- Problem 93d
- Problem 94a
- Problem 94b
- Problem 95
- Problem 96
- Problem 97