Question
In: Statistics and Probability
A magazine includes a report on the energy costs per year for 32-inch liquid crystal display...
A magazine includes a report on the energy costs per year for 32-inch liquid crystal display (LCD) televisions. The article states that 14 randomly selected 32-inch LCD televisions have a sample standard deviation of $3.61. Assume the sample is taken from a normally distributed population. Construct 90% confidence intervals for (a) the population variance σ² and (b) the population standard deviation σ.
Interpret the results.
(a) The confidence interval for the population variance is . ???
b) The confidence interval for population standard deviation is ???
Thanks!!!
Solutions
Expert Solution
a)
We know that the 90% confidence interval for population variance is given by:
b)
We know that the 90% confidence interval for population standard deviation is given by:
orchestra answered 2 years agoRelated Solutions
A magazine includes a report on the energy costs per year for 32-inch liquid crystal display...
A magazine includes a report on the energy costs per year for
32-inch liquid crystal display (LCD) televisions. The article
states that 14 14 randomly selected 32-inch LCD televisions have a
sample standard deviation of $ 3.28 3.28. Assume the sample is
taken from a normally distributed population. Construct 99 99%
confidence intervals for (a) the population variance sigma σ
squared 2 and (b) the population standard deviation sigma σ.
Interpret the results. (a) The confidence interval for the
population...
A magazine includes a report on the energy costs per year for 32-inch liquid crystal display...
A magazine includes a report on the energy costs per year for
32-inch liquid crystal display (LCD) televisions. The article
states that 14 randomly selected 32-inch LCD televisions have a
sample standard deviation of $3.37. Assume the sample is taken
from a normally distributed population. Construct 95% confidence
intervals for (a) the population variance sigma squared and (b)
the population standard deviation sigma. Interpret the results.
A magazine includes a report on the energy costs per year for 32-inch liquid crystal display...
A magazine includes a report on the energy costs per year for
32-inch liquid crystal display (LCD) televisions. The article
states that 14 randomly selected 32-inch LCD televisions have a
sample standard deviation of $3.56. Assume the sample is taken
from a normally distributed population. Construct 95% confidence
intervals for (a) the population variance sigmaσsquared2 and (b)
the population standard deviation sigmaσ.
Interpret the results.
A magazine includes a report on the energy costs per year for 32-inch liquid crystal display...
A magazine includes a report on the energy costs per year for
32-inch liquid crystal display (LCD) televisions. The article
states that 14 randomly selected 32-inch LCD televisions have a
sample standard deviation of $3.87. Assume the sample
is taken from a normally distributed population. Construct 90%
confidence intervals for (a) the population variance and (b) the
population standard deviation
Interpret the results.
A magazine includes a report on the energy costs per year for 32-inch liquid crystal display...
A magazine includes a report on the energy costs per year for
32-inch liquid crystal display (LCD) televisions. The article
states that 14 randomly selected 32-inch LCD televisions have a
sample standard deviation of $3.59.Assume the sample is taken from
a normally distributed population. Construct 99% confidence
intervals for (a) the population variance sigmaσsquared2 and (b)
the population standard deviation sigmaσ.Interpret the results.
A magazine includes a report on the energy costs per year for 32-inch liquid crystal display...
A magazine includes a report on the energy costs per year for
32-inch liquid crystal display (LCD) televisions. The article
states that
1414
randomly selected 32-inch LCD televisions have a sample
standard deviation of
$3.773.77.
Assume the sample is taken from a normally distributed
population. Construct
9898%
confidence intervals for (a) the population variance
sigmaσsquared2
and (b) the population standard deviation
sigmaσ.
Interpret the results.
(a) The confidence interval for the population variance is
(nothing,nothing).
(Round to two decimal places...
A magazine includes a report on the energy costs per year for 32-inch liquid crystal display...
A magazine includes a report on the energy costs per year for
32-inch liquid crystal display (LCD) televisions. The article
states that
14
randomly selected 32-inch LCD televisions have a sample
standard deviation of
$3.05.
Assume the sample is taken from a normally distributed
population. Construct
90%
confidence intervals for (a) the population variance
sigmaσsquared2
and (b) the population standard deviation
sigmaσ.
Interpret the results.
(a) The confidence interval for the population variance is
(Round to two decimal places as...
A magazine includes a report on the energy costs per year for 32-inch liquid crystal display...
A
magazine includes a report on the energy costs per year for 32-inch
liquid crystal display (LCD) televisions. The article states that
14 randomly selected 32-inch LCD televisions have a sample standard
deviation of $3.59. Assume the sample is taken from a normally
distributed population. Construct 98% confidence intervals for (a)
the population variance σ2 and (b) the population standard
deviation σ. Interpret the results. (a) The confidence interval for
the population (b) (Round to two decimal places as needed.)
A consumer price analyst claims that prices for liquid crystal display (LCD) computer monitors have a...
A consumer price analyst claims that prices for liquid crystal
display (LCD) computer monitors have a mean of $ 170 and a standard
deviation of $ 47.
2. You randomly selected 25 LCD compute monitors. What is the
probability that their mean cost is less than $ 180? Assume here
that the prices are normally distributed
3. You randomly selected 64 LCD compute monitors. What is the
probability that their mean cost is less than $ 180?
A manufacture of laptop computers has four models, two with color lcd (liquid crystal display) screens...
A manufacture of laptop computers has four models, two with
color lcd (liquid crystal display) screens (the spot model and the
superba model) and two model with black and white lcd screens ( the
standard model and the excel model). each model required assembly
and test time and the requirements are shown in the table 2,
together with the amount of time available for assembly and testing
next month. LCD.
the lcd screens are purchased from and outside supplier and,...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- . Use the following information to calculate your company's expected return State Probability Return Boom 20%...
- You are considering the following two projects and can only take one. Your cost of capital...
- C++: Write a program that produces truth tables for the following compound propositions. Write the header...
- 1. What is the historical role of investment bankers ? Has this role changed ? Why...
- How were the original Internet requirements met through its design? What are the two main requirements...
- discuss crowdfunding on platforms: What features of the services incorporate virality? What are some of the...
- A textbook of mass 2.08 kg rests on a frictionless, horizontal surface. A cord attached to...
ADVERTISEMENT