Suppose that a certain brand of light bulb has a mean life of 450 hours and a standard deviation of 73 hours. Assuming the data

Question

3 years ago

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Suppose that a certain brand of light bulb has a mean life of 450 hours and a standard deviation of 73 hours. Assuming the data

are bell-shaped: (Show work to get full credit)
a. Would it be unusual for a light bulb to have a life span of 320 hours? 615 hours? Justify each response.
b. According to the Empirical Rule, 99.7% of the light bulbs have a lifetime between what two values?
c. Determine the percentage of light bulbs that will have a life between 304 and 596 hours.

Mathematics

1 answer:

Mrac [35] · Answer 1 · 2022-01-18T00:53:14+03:00

Mrac [35]3 years ago

4 0

Answer:

yes it is correct

Step-by-step explanation:

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