Short Answer
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 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?
______________
Correct Answer:
Verified
Correct Answer:
Verified
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