Question
In: Statistics and Probability
An article in the Journal of Environmental Engineering (1989, Vol. 115(3), pp. 608–619) reported the results...
An article in the Journal of Environmental Engineering (1989, Vol. 115(3), pp. 608–619) reported the results of a study on the occurrence of sodium and chloride in surface streams in central Rhode Island. The following data are chloride concentration y (in milligrams per liter) and roadway area in the watershed x (in percentage). (5px5)
Y: 4.4 6.6 9.7 10.6 10.8 10.9 11.8 12.1 14.3 14.7 15.0 17.3 19.2 23.1 27.4 27.7 31.8 39.5 X: 0.19 0.15 0.57 0.70 0.67 0.63 0.47 0.70 0.60 0.78 0.81 0.78 0.69 1.30 1.05 1.06 1.74 1.62
a) Draw a scatter diagram of the data. Does a simple linear regression model seem appropriate here?
b) Fit the simple linear regression model using the method of least squares. Find an estimate of σ2 .
c) Test the significance of the regression coefficients, use =0.05.
d) Test the adequacy of the regression model, use =0.05.
e) Find the fitted value corresponding to x = 0 47. and the associated residual.
Solutions
orchestra answered 2 years agoRelated Solutions
An article in the journal Hazardous Waste and Hazardous Materials (Vol. 6, 1989) reported the results...
An article in the journal Hazardous Waste and Hazardous
Materials (Vol. 6, 1989) reported the results of an analysis of the
weight of calcium in standard cement and cement doped with lead.
Reduced levels of calcium would indicate that the hydration
mechanism in the cement is blocked and would allow water to attack
various locations in the cement structure.
Ten samples of standard cement had an average weight percent
calcium of 90.0, with a sample standard deviation of 5.0 and...
1. An article from an Environmental Engineering journal reported the results of a study on the...
1. An article from an Environmental Engineering
journal reported the results of a study on the occurrence
of sodium and chloride on the surface of water currents in Rhode
Island. The following data presents
the concentration of chloride designated ? (in milligrams per
liter) and the taxiway area in the basin
as ? (in percentage).
? 4.4 6.6 9.7 10.6 10.8 10.9
? 0.19 0.15 0.57 0.70 0.67 0.63
? 11.8 12.1 14.3 14.7 15.0 17.3
? 0.47 0.70 0.60...
An article in the Journal of Sound and Vibration (Vol. 151, 1991, pp. 383–394) described a...
An article in the Journal of Sound and Vibration (Vol.
151, 1991, pp. 383–394) described a study investigating the
relationship between noise exposure and hypertension. The following
data are representative of those reported in the article.
y
x
y
x
1
60
5
85
0
63
4
89
1
65
6
90
2
70
8
90
5
70
4
90
1
70
5
90
4
80
7
94
6
90
9
100
2
80
7
100
3
80
6
100...
10.2.9 An article in Radio Engineering and Electronic Physics (1980, Vol. 25, pp. 74-79) investigated the...
10.2.9
An article in Radio Engineering and Electronic Physics
(1980, Vol. 25, pp. 74-79) investigated the behavior of a
stochastic generator in the presence of external noise. The number
of periods was measured in a sample of 100 trains for each of two
different levels of noise voltage, 100 and 150 mV. For 100 mV, the
mean number of periods in a train was 7.9 with
s1 = 2.6. For 150 mV, the mean was 6.9 with
s2 = 2.4....
An article in the Journal of Aircraft (Vol. 23, 1986, pp.859–864) described a new equivalent plate...
An article in the Journal of Aircraft (Vol. 23, 1986,
pp.859–864) described a new equivalent plate analysis method
formulation that is capable of modeling aircraft structures such as
cranked wing boxes and that produces results similar to the more
computationally intensive finite element analysis method. Natural
vibration frequencies for the cranked wing box structure are
calculated using both methods, and results for the first seven
natural frequencies follow:
Frequency Finite Element, Cycle/s Equivalent Plate,
Cycle/s
1 14.58 14.76
2 48.52...
An article in Journal of Structural Engineering presents the results of an experiment that evaluated a...
An article in Journal of Structural Engineering
presents the results of an experiment that evaluated a standard
method for estimating the brace force for a truss. In a sample of
360 short test trusses the method underestimated the force for 45
of them, and in a sample of 400 long test trusses, the method
underestimated the force for 60 of them. Find a 95% confidence
interval for the difference between the underestimation rates for
long and short trusses.
In the journal Mental Retardation, an article reported the results of a peer tutoring program to...
In the journal Mental Retardation, an article reported the
results of a peer tutoring program to help mildly mentally retarded
children learn to read. In the experiment, the mildly retarded
children were randomly divided into two groups: the experimental
group received peer tutoring along with regular instruction, and
the control group received regular instruction with no peer
tutoring. There were n1 = n2 = 31 children in each group. The
Gates-MacGintie Reading Test was given to both groups before
instruction...
In the journal Mental Retardation, an article reported the results of a peer tutoring program to...
In the journal Mental Retardation, an article reported
the results of a peer tutoring program to help mildly mentally
retarded children learn to read. In the experiment, Form 2 of the
Gates-MacGintie Reading Test was administered to both an
experimental group and a control group after 6 weeks of
instruction, during which the experimental group received peer
tutoring and the control group did not. For the experimental group
n1 = 30 children, the mean score on the
vocabulary portion of...
In the journal Mental Retardation, an article reported the results of a peer tutoring program to...
In the journal Mental Retardation, an article reported
the results of a peer tutoring program to help mildly mentally
retarded children learn to read. In the experiment, Form 2 of the
Gates-MacGintie Reading Test was administered to both an
experimental group and a control group after 6 weeks of
instruction, during which the experimental group received peer
tutoring and the control group did not. For the experimental group
n1 = 30 children, the mean score on the
vocabulary portion of...
In the journal Mental Retardation, an article reported the results of a peer tutoring program to...
In the journal Mental Retardation, an article reported the
results of a peer tutoring program to help mildly mentally retarded
children learn to read. In the experiment, Form 2 of the
Gates-MacGintie Reading Test was administered to both an
experimental group and a control group after 6 weeks of
instruction, during which the experimental group received peer
tutoring and the control group did not. For the experimental group
n1 = 30 children, the mean score on the vocabulary portion of...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- 3) You are rolling a 12 sided die 8 times. a) What is the size for...
- explain the difference between quantitative and qualitative research strategies. Provide an example of a crime based...
- use postorder and inorder tree traversals to make preorder traversal. #!/usr/bin/env python3 # encoding: UTF-8 """Turning...
- 1. Write an if-else statement to describe an object. Print "Balloon" if isBalloon is true and...
- An investor is considering purchasing a Treasury bond with a 20 year maturity, an 8% coupon...
- Write a program that copies the contents of one file to a destination file. This program...
- how to conduct a marketing mix for 3d crest white strips
ADVERTISEMENT