A P/OM Student Has Purchased a Four-Function Calculator for Use

question 12

Multiple Choice

A P/OM student has purchased a four-function calculator for use during exams.This calculator is perfectly reliable except for two parts: its microchip,which has a failure rate of one in every twenty hours of operation; and its battery,which has a failure rate of one in every ten hours of operation.Also,on average the battery will fail in five hours,with a standard deviation of 30 minutes.What service life should the manufacturer specify in order to have a .8413 probability that a battery will not fail within that amount of time?

• A)3.5 hours
• B)4 hours
• C)4.5 hours
• D)5 hours
• E)5.5 hours

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Definitions:

Africa

The world's second-largest and second-most populous continent, known for its diverse cultures, languages, and natural resources.

Cultural Nationalism

A form of nationalism focused on the promotion of one's own nation’s culture and interests over foreign influences.

African Americans

A racial or ethnic group in the United States with ancestry from the black racial groups of Africa, including descendants of enslaved people brought to the U.S.

Mexican Americans

Americans of Mexican descent who have a unique cultural identity and history within the United States.