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Dmitrij [34]
3 years ago
13

Suppose the life of a particular brand of calculator battery is approximately normally distributed with a mean of 75 hours and a

standard deviation of 10 hours. If the manufacturer of the battery is able to reduce the standard deviation of battery life from 10 to 9 hours, what would be the probability that 16 batteries randomly sampled from the population will have a sample mean life of between 70 and 80 hours
Mathematics
1 answer:
Orlov [11]3 years ago
3 0

Answer:

idek

Step-by-step explanation:

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