If Light Bulbs Have Lives That Are Normally Distributed with a Mean

question 25

Short Answer

If light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard
deviation of 500 hours, what percent of the bulbs will not last as long as 2000 hours?
Apply the 68-95-99.7 rule to answer #4 and #5.

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Definitions:

Foreign-Currency Exchange

The process of converting one currency into another currency, typically through a financial institution.

Exchange Rate

The value of one country's currency in terms of another's, used in foreign exchange markets to facilitate international trade.

Supply Of Dollars

The total amount of US dollars available in the global market, including cash and bank deposits.

Real Exchange Rate

The rate at which two currencies can be exchanged to purchase the same basket of goods and services, taking into account inflation rates of the involved countries.