Answered step by step
Verified Expert Solution
Question
...
1 Approved Answer
The shoe sizes of 36 women are measured, and their average is 8.2 a. Suppose it is known that the standard deviation of shoe size
The shoe sizes of 36 women are measured, and their average is 8.2
a. Suppose it is known that the standard deviation of shoe size is 1.17. Find a 95% confidence interval for the average shoe size of an adult woman.
b. How large a sample of shoe sizes should we take to ensure that the margin of error of a 80% confidence interval is 0.25 shoe sizes?
c. Suppose the standard deviation of shoe size is unknown, but the standard deviation of the sample was 0.95. Find a 90% confidence interval for the average shoe size.
Step by Step Solution
There are 3 Steps involved in it
Step: 1
![blur-text-image](https://dsd5zvtm8ll6.cloudfront.net/includes/images/document_product_info/blur-text-image.webp)
Get Instant Access with AI-Powered Solutions
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
![blur-text-image](https://dsd5zvtm8ll6.cloudfront.net/includes/images/document_product_info/blur-subtext-image.webp)
Step: 3
![blur-text-image](https://dsd5zvtm8ll6.cloudfront.net/includes/images/document_product_info/blur-subtext-image.webp)
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get Started