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For the table shown below, the random variable x is the number of males with tinnitus
(ringing ears)among four randomly selected males, based on a medical journal. Find the
mean and standard deviation for the random variable x. Use the range rule of thumb to
identify the range of values that are not significant for the number of males with tinnitus
among four randomly selected males. Is getting three males with tinnitus among four
randomly selected males a significantly high number?
Warren Buffett
An American investor, business tycoon, philanthropist, and the chairman and CEO of Berkshire Hathaway, known for his successful investment strategies.
Average Tax Rate
The percentage of taxable income that is paid in taxes; taxes paid divided by taxable income.
Stock Market Investor
An individual or entity that allocates capital with the expectation of receiving financial returns in the stock market.
Marginal Tax Rate
The tax rate that applies to the next dollar of taxable income; the percentage of tax applied to your income for each tax bracket in which you qualify.
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