Statistics: Informed Decisions Using Data; Student Solutions Manual; My StatLab Glue-in Access Card; Sticker for Glue-In Packages (5th Edition)
5th Edition
ISBN: 9780134647791
Author: Michael Sullivan III
Publisher: PEARSON
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Chapter 14, Problem 7RE
(a)
To determine
The correlation matrix.
To determine
To identify: The multicolinearity.
(b)
To determine
To identify: The least-squares regression equation.
(c)
To determine
To draw: The residual plot.
To determine
To draw: The boxplot.
To determine
To draw: The normal plot.
(d)
To determine
To interpret: The regression coefficient.
(e)
To determine
The value of R 2
To determine
To interpret: The value of
To determine
The value of adjusted R 2
To determine
To interpret: The value of adjusted
(f)
To determine
To test: The hypothesis.
(g)
To determine
To test: The hypothesis.
To determine
To test: The hypothesis.
(h)
To determine
The confidence interval.
(i)
To determine
The confidence interval.
To determine
To interpret: The result.
To determine
The prediction interval.
To determine
To interpret: The result.
To determine
To interpret: The results.
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Microsoft Excel snapshot for random sampling: Also note the formula used for the last
column
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x✓ fx =INDEX(5852:58551, RANK(C2, $C$2:$C$51))
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No.
States
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ALABAMA
Rand No.
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3
2
ALASKA
0.372999976
4
3
ARIZONA
0.941323044
5
4 ARKANSAS
0.071266381
Random Sample
CALIFORNIA
NORTH CAROLINA
ARKANSAS
WASHINGTON
G7
Microsoft Excel snapshot for systematic sampling:
xfx INDEX(SD52:50551, F7)
A
B
E
F
G
1
No.
States
Rand No. Random Sample
population
50
2
1 ALABAMA
0.5296685 NEW HAMPSHIRE
sample
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2 ALASKA
0.4493186 OKLAHOMA
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3 ARIZONA
0.707914 KANSAS
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4 ARKANSAS 0.4831379 NORTH DAKOTA
6
5 CALIFORNIA 0.7277162 INDIANA
Random Sample
Sample Name
7
6 COLORADO 0.5865002 MISSISSIPPI
8
7:ONNECTICU 0.7640596 ILLINOIS
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8 DELAWARE 0.5783029 MISSOURI
525
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INDIANA
MARYLAND
COLORADO
Suppose the Internal Revenue Service reported that the mean tax refund for the year 2022 was $3401. Assume the standard deviation is $82.5 and that the amounts refunded follow a normal probability distribution. Solve the following three parts? (For the answer to question 14, 15, and 16, start with making a bell curve. Identify on the bell curve where is mean, X, and area(s) to be determined.
1.What percent of the refunds are more than $3,500?
2. What percent of the refunds are more than $3500 but less than $3579?
3. What percent of the refunds are more than $3325 but less than $3579?
A normal distribution has a mean of 50 and a standard deviation of 4. Solve the following three parts?
1. Compute the probability of a value between 44.0 and 55.0.
(The question requires finding probability value between 44 and 55. Solve it in 3 steps.
In the first step, use the above formula and x = 44, calculate probability value.
In the second step repeat the first step with the only difference that x=55.
In the third step, subtract the answer of the first part from the answer of the second part.)
2. Compute the probability of a value greater than 55.0.
Use the same formula, x=55 and subtract the answer from 1.
3. Compute the probability of a value between 52.0 and 55.0.
(The question requires finding probability value between 52 and 55. Solve it in 3 steps.
In the first step, use the above formula and x = 52, calculate probability value.
In the second step repeat the first step with the only difference that x=55.
In the third step, subtract the answer of the first part from the…
Chapter 14 Solutions
Statistics: Informed Decisions Using Data; Student Solutions Manual; My StatLab Glue-in Access Card; Sticker for Glue-In Packages (5th Edition)
Ch. 14.1 - 1. Suppose a least-squares regression line is...Ch. 14.1 - 2. True or False: In a least-squares regression,...Ch. 14.1 - 3. In the least-squares regression model, yi =...Ch. 14.1 - 4. If H0: β1 = 0 is not rejected, what is the best...Ch. 14.1 - In Problems 5–10, use the results of Problems...Ch. 14.1 - In Problems 5–10, use the results of Problems...Ch. 14.1 - In Problems 5–10, use the results of Problems...Ch. 14.1 - In Problems 5–10, use the results of Problems...Ch. 14.1 - In Problems 5–10, use the results of Problems...Ch. 14.1 - In Problems 5–10, use the results of Problems...
Ch. 14.1 - 11. An Unhealthy Commute The following data...Ch. 14.1 - 12. Credit Scores An economist wants to determine...Ch. 14.1 - Prob. 13AYUCh. 14.1 - 14. Hurricanes The following data represent the...Ch. 14.1 - 15. Concrete As concrete cures, it gains...Ch. 14.1 - Prob. 16AYUCh. 14.1 - 17. Invest in Education Go to...Ch. 14.1 - 18. American Black Bears In 1969, Dr. Michael R....Ch. 14.1 - 19. CEO Performance (Refer to Problem 31 in...Ch. 14.1 - 20. Bear Markets (Refer to Problem 32, Section...Ch. 14.1 - 21. Age versus HDL Cholesterol A doctor wanted to...Ch. 14.1 - 22. The U.S. Population The following data...Ch. 14.1 - Prob. 23AYUCh. 14.1 - 24. The output shown was obtained from...Ch. 14.1 - 25. Influential Observations Zillow.com is a site...Ch. 14.1 - 26. Why is it important to perform graphical as...Ch. 14.1 - 27. What do the y-coordinates on the least-squares...Ch. 14.1 - 28. Why is it desirable to have the explanatory...Ch. 14.1 - 29. Why don't we conduct inference on the linear...Ch. 14.2 - 1. Intervals constructed about the predicted value...Ch. 14.2 - 2. Intervals constructed about the predicted value...Ch. 14.2 - In Problems 3–6, use the results of Problems 5–8...Ch. 14.2 - In Problems 3–6, use the results of Problems 5–8...Ch. 14.2 - Prob. 5AYUCh. 14.2 - Prob. 6AYUCh. 14.2 - Prob. 7AYUCh. 14.2 - Prob. 8AYUCh. 14.2 - Prob. 9AYUCh. 14.2 - Prob. 10AYUCh. 14.2 - Prob. 11AYUCh. 14.2 - Prob. 12AYUCh. 14.2 - Prob. 13AYUCh. 14.2 - Prob. 14AYUCh. 14.2 - Prob. 15AYUCh. 14.2 - Prob. 16AYUCh. 14.2 - 17. Putting It Together: Predicting Intelligence...Ch. 14.3 - Prob. 1AYUCh. 14.3 - Prob. 2AYUCh. 14.3 - Prob. 3AYUCh. 14.3 - Prob. 4AYUCh. 14.3 - Prob. 5AYUCh. 14.3 - Prob. 6AYUCh. 14.3 - Prob. 7AYUCh. 14.3 - Prob. 8AYUCh. 14.3 - Prob. 9AYUCh. 14.3 - Prob. 10AYUCh. 14.3 - 11. For the data...Ch. 14.3 - 12. For the data...Ch. 14.3 - Prob. 13AYUCh. 14.3 - Prob. 14AYUCh. 14.3 - Prob. 15AYUCh. 14.3 - Prob. 16AYUCh. 14.3 - Prob. 17AYUCh. 14.3 - Prob. 18AYUCh. 14.3 - Prob. 19AYUCh. 14.3 - Prob. 20AYUCh. 14.3 - Prob. 21AYUCh. 14.3 - Prob. 22AYUCh. 14.3 - Prob. 23AYUCh. 14.3 - Prob. 24AYUCh. 14.4 - Prob. 1AYUCh. 14.4 - Prob. 2AYUCh. 14.4 - Prob. 3AYUCh. 14.4 - Prob. 4AYUCh. 14.4 - Prob. 5AYUCh. 14.4 - Prob. 6AYUCh. 14.4 - Prob. 7AYUCh. 14.4 - Prob. 8AYUCh. 14.4 - Prob. 9AYUCh. 14.4 - Prob. 10AYUCh. 14.4 - Prob. 11AYUCh. 14.5 - Prob. 1AYUCh. 14.5 - Prob. 2AYUCh. 14.5 - Prob. 3AYUCh. 14.5 - Prob. 4AYUCh. 14.5 - Prob. 5AYUCh. 14.5 - Prob. 6AYUCh. 14.5 - Prob. 7AYUCh. 14.6 - Prob. 1AYUCh. 14.6 - Prob. 2AYUCh. 14.6 - 3. Housing Prices A realtor wanted to find a...Ch. 14.6 - Prob. 4AYUCh. 14.6 - Prob. 5AYUCh. 14.6 - Prob. 6AYUCh. 14.6 - Prob. 7AYUCh. 14.6 - Prob. 8AYUCh. 14 - Prob. 1RECh. 14 - Prob. 2RECh. 14 - Prob. 3RECh. 14 - Prob. 4RECh. 14 - Prob. 5RECh. 14 - Prob. 6RECh. 14 - Prob. 7RECh. 14 - Prob. 8RECh. 14 - Prob. 9RECh. 14 - Prob. 10RECh. 14 - Prob. 1CTCh. 14 - Prob. 2CTCh. 14 - Prob. 3CTCh. 14 - Prob. 4CTCh. 14 - Prob. 5CTCh. 14 - 6. A nutritionist wants to develop a model that...Ch. 14 - During the early 2000s, the United States...
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