On October 17, 2007, the classified ads on the web site of The Seattle Times listed the following 13 used Toyota Prius automobiles for sale; the data set below shows the year, color, mileage (in miles) and asking price (in U.S. dollars) for each car:
year color mileage price 2006 green 17043 25995 2007 gray 12628 24980 2005 maroon 24039 24885 2005 silver 48226 23995 2006 black 10522 22995 2004 silver 66345 21995 2007 white 5611 21995 2005 gold 24479 21595 2004 white 14618 20995 2005 silver 53699 20980 2004 silver 47649 17995 2003 white 39600 17500 2005 black 103126 16995
We wish to investigate a possible association between the mileageof each Prius and its price. You should construct a scatterplot of this data.
assume that a linear model is appropriate, regardless of your
answer to the previous question.
1. Find the equation of the regression line for this data that
predicts price based upon mileage:
2. Use the model to predict the asking price of a Toyota Prius with 450,000 miles, or explain why such a prediction is not appropriate:
3. Use the model to predict the asking price of a Toyota Prius with 45,000 miles, or explain why such a prediction is not appropriate:
4. Compute the residual for the green Prius:
In: Statistics and Probability
1a
A teacher gives a third grade class of n = 16 a reading skills test at the beginning of the school year. To evaluate the changes that occur during the year, students are tested again at the end of the year. Their test scores revealed an average improvement of MD = 4.7 points with SS = 2160.
Are the test scores at the end of the year significantly higher than the test scores at the beginning of the year.
Perform a hypothesis test using repeated-measures t-test. Use a one-tailed test with α = .01.
The alternative hypothesis in words is
Group of answer choices
a)The test scores at the end of the year are significantly different from the test scores at the beginning of the year
b)The test scores at the end of the year are not significantly higher than the test scores at the beginning of the year
c)The test scores at the end of the year are significantly higher than the test scores at the beginning of the year
d)The test scores at the end of the year are not significantly different from the test scores at the beginning of the year
e)The null hypothesis in symbols is
1b)Group of answer choices
a)H0: µD= 0
b)H0: µD≠ 0
c)H0: µ1> µ2
d)H1: µD> 0
e)H0: µ1= µ2
f)H0: µD≤ 0
1c)The critical t-value is
1d)The t-statistic is
Your decision is
a)Fail to reject the null hypothesis because the t-statistic is not greater than the critical t-value
b)Reject the null hypothesis because the t-statistic is greater than the critical t-value
c)Reject the null hypothesis because the t-statistic is not greater than the critical t-value
d)Fail to reject the null hypothesis because the t-statistic is greater than the critical t-value
1e) Construct a 99% confidence interval to estimate the average improvement for the population of third graders.
The lower boundary is:
The upper boundary of the confidence interval you constructed in the previous question is:
If all the possible random samples with n = 16 scores are selected from a normal population with µ = 80 and σ = 20, and the mean is calculated for each sample, then the Expected Value of M is _____ and the Standard Error of M is _____?
a) 80, 20
b) 80, 5
c) 20, 20
d) 5, 80
In: Statistics and Probability
Living things can only tolerate a limited range of conditions.
Describe two limits to animal life in general. For each limit
give an approximate upper or lower bound.
describe the physiological adaptations of one animal discussed in class that is able to survive closer to that boundary than most other animals can
Explain in detail the mechanisms those adaptations use to allow life close to the limit
In: Biology
A thin rectangular plate coincides with the region defined by 0
≤ x ≤ π,
0 ≤ y ≤ 1. The left end and right end of the plate are insulated.
The
bottom of the plate is held at temperature zero and the top of the
plate
is held at temperature f(x) = 4 cos(6x) + cos(7x).
Set up an initial-boundary value problem for the steady-state
temperature u(x, y).
In: Advanced Math
It is argued that organization can be a factor in decision making. In other words, they can influence decision-making in favor or against a decision maker. It is also argued that organizations or institutions by providing the framework or boundary, they shelter decision makers from making decisions that would have deleterious effect to other the decision-makers and the organization. Please discuss how organizations or institutions can act as a shelter against risk.
In: Economics
Write the heat conduction equation (without flow in and out) in
cartesian coordinates for the following case:
1. Steady-state, 1-D, without heat generation (2 points)
2.Transient, 1-D, without heat generation (2 points)
3.Transient, 3-D, with heat generation (3 points)
3. Write the three types of boundary conditions. (3 points)
In: Mechanical Engineering
1. Light of wavelength 620nm in air is incident on a surface of a flat piece of glass with an index of refraction of
1.50 with an angle of incidence of 30°.
a.What is the angle of refraction?
-Answer: 19.5°
b. Find the wavelength and frequency of light in glass.
Answer: 413nm, 4.84x1014Hz
c.Explain under what circumstances “total internal reflection” can be observed at the boundary between air
and this piece of glass. Be as specific as possible.
In: Physics
Prepare a powerpoint presentation on “A Leadership Principle from the Life and Ministry of the Apostle Paul.” The purpose is too discover and assess the leadership principles used by a man of God whom the Lord blessed in crucial portion of church history and organize a lesson to teach others. Application: To learn how to improve your own leadership characteristics, methodologies, and results in your present or future ministry, as well as how to teach leadership to others.
In: Psychology
TWO relevant examples of how healthcare provider organizations can leverage health information technology and improve processes to provide better patient quality of care. Response is supported by references to academic resources.
In: Nursing
the debate rages on whether on academic or vocational qualification is more disirable . it is products to invest in a rilly secure employment as oppose to skills-based training. take a stance and argue your point with valid example
In: Economics