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Light bulbs are measured in lumens (light output), watts (energy used), and hours (life). A standard ...

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Light bulbs are measured in lumens (light output), watts (energy used), and hours (life). A standard ...

Light bulbs are measured in lumens (light output), watts (energy used), and hours (life). A standard white light bulb has a mean life of 675 hours and a standard deviation of 50 hours. A soft white light bulb has a mean life of 700 hours and a standard deviation of 35 hours. In a test at a local science competition, both light bulbs lasted 750 hours. Which light bulb's life span was better? Explain.

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Stats: Modeling the World

Edition: 4^th

Authors: Bock, Velleman, De Veaux

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