Question
In: Statistics and Probability
Suppose that the probability that a fluorescent light will have a useful life of at least...
Suppose that the probability that a fluorescent light will have a useful life of at least 500 hours is 0.85. Suppose you have 10 of these fluorescent lights in your workshop. Find the following probabilities:
(a) The probability that 8 of these will have a useful life of at least 500 hours.
(b) The probability that at most 2 of them will not have a useful life of 500 hours.
Solutions
orchestra answered 2 years agoRelated Solutions
Suppose that the probability that a fluorescent light will have a useful life of at least...
Suppose that the probability that a fluorescent light
will have a useful life of at least 500 hours is 0.85. Suppose you
have 10 of these fluorescent lights in your workshop. Find the
following probabilities:
a. The probability that 8 of these will have a useful
life of at least 500 hours.
b. The probability that at most 2 of them will not have
a useful life of 500 hours.
Problem: A random sample of 56 fluorescent light bulbs has a mean life of 645 hours...
Problem:
A random sample of 56 fluorescent light bulbs has a mean life of
645 hours with a standard deviation of 31 hours. Construct a 95%
confidence interval for the population mean.
Question: DO WE USE A Z OR T SCORE? WHICH ONE AND WHY.
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A manufacturer of compact fluorescent light bulbs advertises that the distribution of the lifespans of these...
A manufacturer of compact fluorescent light bulbs advertises
that the distribution of the lifespans of these light bulbs is
nearly normal with a mean of 9,000 hours and a standard deviation
of 1,000 hours.
(a) What is the probability that a randomly chosen light bulb lasts
more than 10,500 hours?
(please round to four decimal places) (b) Describe the
distribution of the mean lifespan of 15 light bulbs.
approximately normal with μ = 9000 and σ=1000√15σ=100015
approximately normal with μ...
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.
Explain how light is produced in the fluorescent light tube about your head using the quantum...
Explain how light is produced in the fluorescent light tube
about your head using the quantum theory model.
TYY!!!
If you excite a fluorescent sample with light of 310 nm, in addition to the peaks...
If you excite a fluorescent sample with light of 310 nm, in
addition to the peaks from the light emitted by the molecule of
interest, at what other wavelengths (in nm) would you expect to see
peaks in the spectrum? Why?
A manufacturer of light bulbs claims that its light bulbs have a mean life of 1520...
A manufacturer of light bulbs claims that its light bulbs have
a mean life of 1520 hours. If a random sample of 40 bulbs is tested
and has an average life of 1500 hours and the standard deviation is
80 hours, is there sufficient evidence to claim that the mean life
is different than the manufacturer's claim? Use
alpha = 0.01.
Calculate the test
statistic.
Calculate a confidence interval
for the true mean light bulb life. Use the level of...
A company is considering an investment that will cost $743,000 and have a useful life of...
A company is considering an investment that will cost $743,000
and have a useful life of 8 years. The cash flows from the project
are expected to be $410,000 per year in the first two years then
$142,000 per year for the last 6 years. If the appropriate discount
rate is 12.7 percent per annum, what is the NPV of this investment
(to the nearest dollar)?
Select one:
a. $394283
b. $1880283
c. $384492
d. $516026
A company is considering an investment that will cost $744,000 and have a useful life of...
A company is considering an investment that will cost $744,000
and have a useful life of 8 years. The cash flows from the project
are expected to be $512,000 per year in the first two years then
$108,000 per year for the last 6 years. If the appropriate discount
rate is 15.0 percent per annum, what is the NPV of this investment
(to the nearest dollar)?
Select one:
a. $397417
b. $1885417
c. $415178
d. $497087
The cost to purchase “New Tech” will be $421,000 and will have a useful life of...
The cost to purchase “New Tech” will be $421,000 and will have
a useful life of 6 years; “New Tech” will have a salvage value of
$26,000 at the end of 6 years. The cost to purchase “Standard
Classic” will be $235,000 and will also have a useful life of 6
years; “Standard Classic” will have a salvage value of $5,000 at
the end of 6 years.
Total Contribution Margin from the sale of Widgets will be
different for each...
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