The student will calculate the 90% confidence interval for the mean cost of a home in the area in which this school is located.
The student will interpret confidence intervals.
The student will determine the effects that changing conditions has on the confidence interval.
Collect the data
Check the Real Estate section in your local newspaper. (Note: many papers only list them
one day per week. Also, we will assume that homes come up for sale randomly.) Record thesales prices for 35 randomly selected homes recently listed in the county.
Complete the table:
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Describe the data
Compute the following:
$\overline{x}$ =
${s}_{x}$ =
$n$ =
Define the Random Variable
$\overline{X}$ ,
in words.
$\overline{X}$ =
State the estimated distribution to use. Use both words and symbols.
Find the confidence interval
Calculate the confidence interval and the error bound.
Confidence Interval:
Error Bound:
How much area is in both tails (combined)?
$\alpha $ =
How much area is in each tail?
$\frac{\alpha}{2}$ =
Fill in the blanks on the graph with the area in each section. Then, fill in the number
line with the upper and lower limits of the confidence interval and the sample mean.
Some students think that a 90% confidence interval contains 90% of the data. Use the list of data on the
first page and count how many of the data values lie within the confidence interval. What percent is this?Is this percent close to 90%? Explain why this percent should or should not be close to 90%.
Describe the confidence interval
In two to three complete sentences, explain what a Confidence Interval means (in general),
as if you were talking to someone who has not taken statistics.
In one to two complete sentences, explain what this Confidence Interval means for this
particular study.
Use the data to construct confidence intervals
Using the above information, construct a confidence interval for each confidence level given.
Confidence level
EBM / Error Bound
Confidence Interval
50%
80%
95%
99%
What happens to the EBM as the confidence level increases? Does the width of the confidence interval increase or decrease? Explain why this happens.
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest.
Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.?
How this robot is carried to required site of body cell.?
what will be the carrier material and how can be detected that correct delivery of drug is done
Rafiq
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
how did you get the value of 2000N.What calculations are needed to arrive at it
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1 It is estimated that 30% of all drivers have some kind of medical aid in South Africa. What is the probability that in a sample of 10 drivers: 3.1.1 Exactly 4 will have a medical aid. (8) 3.1.2 At least 2 will have a medical aid. (8) 3.1.3 More than 9 will have a medical aid.