1. The average weight of 6 people in an elevator is 173 pounds. A 7 th person...
Question:
1. The average weight of 6 people in an elevator is 173 pounds. A 7th person gets on and now the average weight is 165 pounds. How much did the 7th person weigh?
2. Use the following data obtained from ages of the last six U.S. Presidents at the time of their inauguration to answer the following questions.
Ages of Last 6 Presidents at Inauguration | |
George Bush | 64 |
Bill Clinton | 46 |
George W. Bush | 54 |
Barack Obama | 47 |
Donald Trump | 70 |
Joe Biden | 78 |
- [1.5 pts] Find the mean of the data set. (Round to one decimal place.)
b. [4 pts] Find the standard deviation of the data set. (Do not round until the final answer. Round final answer to 1 decimal place.)
c. [1 pt] What percentage of presidents' ages fall within one standard deviation of the mean? (Round to 1 decimal place.)
d.[0.5 pt] What percentage of the last six U.S. Presidents were inaugurated while in their 50's? (Round to 1 decimal place.)
e. [0.5 pt]What percentage of the last six U.S. Presidents were inaugurated before the age of 50? (Round to 1 decimal place.)
Microeconomics An Intuitive Approach with Calculus
ISBN: 978-0538453257
1st edition
Authors: Thomas Nechyba