A light bulb factory produces 674 light bulbs every hour. Approximately 2.08% of the light bulbs...
A light bulb factory produces 674 light bulbs every hour. Approximately 2.08% of the light bulbs are defective, and do not work. Using the binomial distribution, what is the expected number of defective bulbs produced in an hour?
For all questions where the answer is a probability, put your answer in percentage form (e.g. 72.4218 not 0.724218) and then round to four decimal places. You do not need to include a % sign.
Homework Answers
Here n=674 and p=0.0208 so the expected value is np
That is 674*0.0208=14.0192 that is 14
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A light bulb factory produces 674 light bulbs every hour.
Approximately 2.08% of the light bulbs...
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A lightbulb factory produces 1117 lightbulbs every hour. Approximately 2.95% of the lightbulbs are defective, and do not work. What is the expected number of defective bulbs produced in an hour? Round to four decimal places.
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Problem 6. (Binomial distribution) A company produces light bulbs. Each bulb is checked before it leaves...
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Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 57...
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Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 57...
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Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 57...
Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 57 hours and a standard deviation of 3.5 hours. With this information answer the following questions. (a) What proportion of light bulbs will last more than 62 hours? (b) What proportion of light bulbs will last 50 hours or less? (c) What proportion of light bulbs will last between 58 and 62 hours? (d) What is the probability that a randomly selected light bulb lasts...
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Light emitting diodes (LED) light bulbs have become required in recent years, but do they make financial sense? Suppose a typical 60-watt incandescent light bulb costs $.47 and lasts 1,000 hours. A 15-watt LED, which provides the same light, costs $3.50 and lasts for 12,000 hours. A kilowatt-hour of electricity costs $.123. A kilowatt-hour is 1,000 watts for 1 hour. If you require a return of 9 percent and use a light fixture 500 hours per year, what is the...
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