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The Distribution of the Time That a Battery Pack for a Laptop

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The distribution of the time that a battery pack for a laptop computer can function before requiring recharging is normal with a mean of 6 hours and a standard deviation of 1.8 hours. A random sample of 25 laptops with this type of battery pack is selected and tested. What is the probability that the mean time until recharging is necessary is at least 7 hours?


Definitions:

Motor Cortex

An area within the cerebral cortex dedicated to planning, controlling, and carrying out voluntary movements.

Phantom Limb Movements

Sensations where amputees feel that their missing limbs are still moving or have sensation.

Association Areas

Regions of the brain that integrate different types of information from sensory and motor areas to perform complex cognitive tasks.

Parietal

Relating to the parietal lobes of the brain, which are involved in processing sensory information such as touch, temperature, and body position.

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