The following observations were made on fracture toughness of a base plate of 18% nickel maraging steel (in ksi vin., given in increasing order)]: 65.2 71.9 72.9 73.1 73.3 73.5 75.5 75.7 75.8 76.1 76.2 76.2 77.0 77.9 78.4 79.6 79.7 79.9 80.1 82.2 83.9 93.7 Calculate a 99% CI for the standard deviation of the fracture toughness distribution. (Round your answers to one decimal place.) ksi Vin Is this interval valid whatever the nature of the distribution? Explain. The distribution needs to be approximately normal. The distribution needs to be skewed to the right. The distribution needs to be approximately uniform. The interval is always valid.
The following observations were made on fracture toughness of a base plate of 18% nickel maraging steel (in ksi vin., given in increasing order)]: 65.2 71.9 72.9 73.1 73.3 73.5 75.5 75.7 75.8 76.1 76.2 76.2 77.0 77.9 78.4 79.6 79.7 79.9 80.1 82.2 83.9 93.7 Calculate a 99% CI for the standard deviation of the fracture toughness distribution. (Round your answers to one decimal place.) ksi Vin Is this interval valid whatever the nature of the distribution? Explain. The distribution needs to be approximately normal. The distribution needs to be skewed to the right. The distribution needs to be approximately uniform. The interval is always valid.
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
Related questions
Question
![The following observations were made on fracture toughness of a base plate of 18% nickel maraging steel (in ksi ✓in., given in
increasing order)]:
65.2 71.9 72.9 73.1 73.3 73.5 75.5 75.7 75.8 76.1 76.2
76.2 77.0 77.9 78.4 79.6 79.7 79.9 80.1 82.2 83.9 93.7
Calculate a 99% CI for the standard deviation of the fracture toughness distribution. (Round your answers to one decimal place.)
])₁ ksi vin
Is this interval valid whatever the nature of the distribution? Explain.
The distribution needs to be approximately normal.
O The distribution needs to be skewed the right.
O The distribution needs to be approximately uniform.
O The interval is always valid.
You may need to use the appropriate table in the Appendix of Tables to answer this question.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F05306099-d17b-4786-a552-6aca0323abbc%2Fd19c1135-7e06-4734-969d-ed89e23c776b%2Fzyfnn28_processed.jpeg&w=3840&q=75)
Transcribed Image Text:The following observations were made on fracture toughness of a base plate of 18% nickel maraging steel (in ksi ✓in., given in
increasing order)]:
65.2 71.9 72.9 73.1 73.3 73.5 75.5 75.7 75.8 76.1 76.2
76.2 77.0 77.9 78.4 79.6 79.7 79.9 80.1 82.2 83.9 93.7
Calculate a 99% CI for the standard deviation of the fracture toughness distribution. (Round your answers to one decimal place.)
])₁ ksi vin
Is this interval valid whatever the nature of the distribution? Explain.
The distribution needs to be approximately normal.
O The distribution needs to be skewed the right.
O The distribution needs to be approximately uniform.
O The interval is always valid.
You may need to use the appropriate table in the Appendix of Tables to answer this question.
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 3 steps with 1 images
Recommended textbooks for you
A First Course in Probability (10th Edition)
Probability
ISBN:
9780134753119
Author:
Sheldon Ross
Publisher:
PEARSON
A First Course in Probability (10th Edition)
Probability
ISBN:
9780134753119
Author:
Sheldon Ross
Publisher:
PEARSON