Question

In: Statistics and Probability

Please do not answer with the incorrect answer!!!!! The life of light bulbs is distributed normally....

Please do not answer with the incorrect answer!!!!!

The life of light bulbs is distributed normally. The variance of the lifetime is 900 and the mean lifetime of a bulb is 580 hours. Find the probability of a bulb lasting for at most 613 hours. Round your answer to four decimal places.

Solutions

Expert Solution

Please DO UPVOTE

orchestra answered 1 year ago
Next > < Previous

Related Solutions

The life expectancy of a brand of light bulbs is normally distributed with a mean of...
The life expectancy of a brand of light bulbs is normally distributed with a mean of 1500 hours and a standard deviation of 75 hours. A. What is the probability that a bulb will last between 1500 and 1650 hours. The life expectancy of a brand of light bulbs is normally distributed with a mean of 1500 hours and a standard deviation of 75 hours. A. What is the probability that a bulb will last between 1500 and 1650 hours....
The life of light bulbs is distributed normally. The standard deviation of the lifetime is 20...
The life of light bulbs is distributed normally. The standard deviation of the lifetime is 20 hours and the mean lifetime of a bulb is 590 hours. Find the probability of a bulb lasting for at most 626 hours. Round your answer to four decimal places.
Suppose that the life expectancy of a certain brand of nondefective light bulbs is normally​ distributed,...
Suppose that the life expectancy of a certain brand of nondefective light bulbs is normally​ distributed, with a mean life of 1100 hr and a standard deviation of 50 hr. If 70,000 of these bulbs are​ produced, how many can be expected to last at least 1100 hr? The number of light bulbs that can be expected to last at least 1100 hr is ______.
A company manufactures light bulbs. These light bulbs have a length of life that is normally...
A company manufactures light bulbs. These light bulbs have a length of life that is normally distributed with a known standard deviation of 40 hours. If a sample of 36 light bulbs has an average life of 780 hours, find the 95 percent confidence interval for the population mean of all light bulbs manufactured by this company.
Average life of light bulbs produced by SABA Electric Co. is believed to be normally distributed...
Average life of light bulbs produced by SABA Electric Co. is believed to be normally distributed with the mean service life of 1200 hours and a standard deviation of 78 hours. A random sample of 169 bulbs is tested and it has a mean life of 1100 hours. Can we conclude that the mean service life of the bulbs is less than the expectation at 98% level of confidence? a. Yes. The mean service life of the bulbs is less...
The lives of certain extra-life light bulbs are normally distributed with a mean equal to 1350...
The lives of certain extra-life light bulbs are normally distributed with a mean equal to 1350 hours and a standard deviation equal to 18 hours. 1. What percentage of bulbs will have a life between 1350 and 1377 hr? 2. What percentage of bulbs will have a life between 1341 and 1350 hr? 3. What percentage of bulbs will have a life between 1338 and 1365 hr? 4. What percentage of bulbs will have a life between 1365 and 1377...
Average life of light bulbs produced by SABA Electric Co. is believed to be normally distributed...
Average life of light bulbs produced by SABA Electric Co. is believed to be normally distributed with the mean service life of 1200 hours and a standard deviation of 78 hours. A random sample of 169 bulbs is tested and it has a mean life of 110 hours. Can we conclude that the mean service life of the bulbs is less than the expectation at 98% level of confidence? a. Yes. The mean service life of the bulbs is less...
The lifetimes of light bulbs are normally distributed with a mean of 500 hours and a...
The lifetimes of light bulbs are normally distributed with a mean of 500 hours and a standard deviation of 25 hours. Find the probability that a randomly selected light bulb has a lifetime that is greater than 532 hours. SHOW FULL WORK!
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 60 hours? (b) What proportion of light bulbs will last 50 hours or less? (c) What proportion of light bulbs will last between 58 and 61 hours? (d) What is the probability that a randomly selected light bulb lasts less than 46 hours? (a)...
Suppose that the lifetimes of light bulbs are approximately normally​ distributed, with a mean of 56...
Suppose that the lifetimes of light bulbs are approximately normally​ distributed, with a mean of 56 hours and a standard deviation of 3.3 hours. With this​ information, answer the following questions. (a) What proportion of light bulbs will last more than 61​hours? ​(b) What proportion of light bulbs will last 51 hours or​ less? ​(c) What proportion of light bulbs will last between 57 and 62 hours? ​(d) What is the probability that a randomly selected light bulb lasts less...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT