Question

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 3.2 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 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 less than 45 ​hours? ​(a) The proportion of light bulbs that last more than 61 hours is nothing.

Please answer A-D and not just A. Thanks!

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
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 3.2 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 52 hours or​ less? ​(c) What proportion of light bulbs will last between 59 and 62 ​hours? ​ (d) What is the probability that a randomly selected light...
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 61 ​hours? ​(b) What proportion of light bulbs will last 51 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...
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 61 ​hours? ​(b) What proportion of light bulbs will last 51 hours or​ less? ​(c) What proportion of light bulbs will last between 59 and 62 ​hours? ​(d) What is the probability that a randomly selected light bulb lasts...
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 61 ​hours? ​(b) What proportion of light bulbs will last 51 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...
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 question. What proportion of light bulbs will last between 59 and 61 hours? (4 decimals) What is the probablity that a randomly selected light bulb lasts less than 45 hours? (4 decimals)
Question: Light bulbs have lifetimes that are known to be approximately normally distributed. Suppose a random...
Question: Light bulbs have lifetimes that are known to be approximately normally distributed. Suppose a random sample of 35 light bulbs was tested, and = 943 hours and s = 33 hours. a. Find a 90% confidence interval for the true mean life of a light bulb. b. Find a 95% lower confidence limit for the true mean life of a light bulb. c. Are the results obtained in (a) and (b) the same or different? Explain why.
The lifetimes of a certain brand of LED light bulbs are normally distributed with a mean...
The lifetimes of a certain brand of LED light bulbs are normally distributed with a mean of 53,400 hours and a standard deviation of 2500 hours. A. If the company making these light bulbs claimed that they would last at least 50,000 hours. What proportion of light bulbs would meet the claim and last at least 50,000 hours? (12) B. The company’s marketing director wants the claimed figure to be where 98% of these new light bulbs to last longer...
.The lifetimes of a certain brand of LED light bulbs are normally distributed with a mean...
.The lifetimes of a certain brand of LED light bulbs are normally distributed with a mean of 53,400 hours and a standard deviation of 2500 hours.A.If the company making these light bulbs claimed that they would last at least 50,000 hours. What proportion of light bulbs would meet the claim and last at least 50,000 hours? (12)B.The company’s marketing director wants the claimed figure to be where 98% of these new light bulbs to last longer than the amount claimed...
The lifetimes of light bulbs produced by a company are normally distributed with mean 1500 hours...
The lifetimes of light bulbs produced by a company are normally distributed with mean 1500 hours and standard deviation 125 hours. (a) What is the probability that a single bulb will last at least 1400 hours? (b) If three new bulbs are installed at the same time, what is the probability that they will all still be burning after 1400 hours? Assume the events are independent. (c) If three new bulbs are installed at the same time, what is the...
The lifetimes of light bulbs that are advertised to last for 5, 000 hours are nor-...
The lifetimes of light bulbs that are advertised to last for 5, 000 hours are nor- mally distributed with a mean of 5, 100 hours and a standard deviation of 200 hours. What is the probability that a bulb lasts longer than the advertised figure?
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT