Question
A weight distribution for males in a certain population is approximately normal with mean mu=170 pounds and standard deviation sigma = 30 pounds. 25 men
A weight distribution for males in a certain population is approximately normal with mean mu=170 pounds and standard deviation sigma = 30 pounds. 25 men are selected. We are interested in the distribution of the average xbar of 25 men if we repeated this study many times.
Describe the distribution of xbar, the average weight. Where is it centered? What is the value of the standard deviation of the mean?
Find an xbar value that is larger than 95% of the xbars.
If you found that xbar value in Part b in your first trial of n=25, would you be surprised? Would that xbar value seem unusual
If we increased the sample size to n=100, describe how the distribution of the xbar values would change. Explain very briefly.
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