Suppose the age at death for politicians can be modeled by an approximately normal distribution with a mean of 72.3 years and a standard deviation of 7.4 years. (Use a table or technology.) (a) Calculate the z-score representing the longest 25% of life expectancies for politicians. (Round your answer to two decimal places.) (b) Calculate the value (in years) representing the top 25% of life expectancies. (Round your answer to one decimal place.) yr
Suppose the age at death for politicians can be modeled by an approximately normal distribution with a mean of 72.3 years and a standard deviation of 7.4 years. (Use a table or technology.) (a) Calculate the z-score representing the longest 25% of life expectancies for politicians. (Round your answer to two decimal places.) (b) Calculate the value (in years) representing the top 25% of life expectancies. (Round your answer to one decimal place.) yr
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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![Suppose the age at death for politicians can be modeled by an approximately normal distribution with a mean of 72.3 years and a standard deviation of 7.4 years. (Use a table or technology.)
(a) Calculate the z-score representing the longest 25% of life expectancies for politicians. (Round your answer to two decimal places.)
- [Input box]
(b) Calculate the value (in years) representing the top 25% of life expectancies. (Round your answer to one decimal place.)
- [Input box] yr](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fec13ab4f-5933-4c78-80c6-824491a34faa%2F5170cf07-d9dd-49ae-ab8e-41c0af39d664%2Fwi4jnh_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Suppose the age at death for politicians can be modeled by an approximately normal distribution with a mean of 72.3 years and a standard deviation of 7.4 years. (Use a table or technology.)
(a) Calculate the z-score representing the longest 25% of life expectancies for politicians. (Round your answer to two decimal places.)
- [Input box]
(b) Calculate the value (in years) representing the top 25% of life expectancies. (Round your answer to one decimal place.)
- [Input box] yr
Expert Solution

Step 1: Define the data for the given distribution.
Let X denotes the life expectancy which follows normal distribution with the mean of 72.3 years and the standard deviation of 7.4 years
That is,
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