MyLab Statistics for Business Stats with Pearson eText -- Standalone Access Card -- for Statistics for Business and Economics
13th Edition
ISBN: 9780134748610
Author: James T. McClave, P. George Benson, Terry Sincich
Publisher: PEARSON
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Chapter 1, Problem 1.29ACI
Inspection of highway bridges. All highway bridges in the United States are inspected periodically for structural deficiency by the Federal Highway Administration (FHWA). Data from the FHWA inspections are compiled into the National Bridge Inventory (NBI). Several of the nearly 100 variables maintained by the NBI are listed below. Classify each variable as quantitative or qualitative.
- a. Length of maximum span (feet)
- b. Number of vehicle lanes
- c. Toll bridge (yes or no)
- d. Average daily traffic
- e. Condition of deck (good, fair, or poor)
- f. Bypass or detour length (miles)
g Route type (interstate, U.S., state, county, or city)
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Students have asked these similar questions
A survey of 581 citizens found that 313 of them favor a new bill introduced by the city.
We want to find a 95% confidence interval for the true proportion of the population who favor the bill.
What is the lower limit of the interval? Enter the result as a decimal rounded to 3 decimal digits.
Your Answer:
2. The SMSA data consisting of 141 observations on 10 variables is fitted by the model
below:
1
y = Bo+B1x4 + ẞ2x6 + ẞ3x8 + √1X4X8 + V2X6X8 + €.
See Question 2, Tutorial 3 for the meaning of the variables in the above model.
The following results are obtained:
Estimate Std. Error t value Pr(>|t|)
(Intercept) 1.302e+03 4.320e+02 3.015 0.00307
x4
x6
x8
x4:x8
x6:x8
-1.442e+02
2.056e+01 -7.013 1.02e-10
6.340e-01 6.099e+00 0.104 0.91737
-9.455e-02 5.802e-02 -1.630
0.10550
2.882e-02 2.589e-03 11.132
1.673e-03 7.215e-04 2.319
F)
x4
1
3486722
3486722
17.9286 4.214e-05
x6
1
14595537
x8
x4:x8
x6:x8
1
132.4836 < 2.2e-16
1045693
194478
5.3769 0.02191
1 1198603043 1198603043 6163.1900 < 2.2e-16
1 25765100 25765100
1045693
Residuals 135 26254490
Estimated variance matrix
(Intercept)
x4
x6
x8
x4:x8
x6:x8
(Intercept)
x4
x6
x8
x4:x8
x6:x8
0.18875694
1.866030e+05 -5.931735e+03 -2.322825e+03 -16.25142055 0.57188953
-5.931735e+03 4.228816e+02 3.160915e+01 0.61621781 -0.03608028 -0.00445013
-2.322825e+03…
In some applications the distribution of a discrete RV, X resembles the Poisson distribution except that 0 is not a possible value of X. Consider such a RV with PMF
where 1 > 0 is a parameter, and c is a constant.
(a) Find the expression of c in terms of 1.
(b) Find E(X).
(Hint: You can use the fact that, if Y ~ Poisson(1), the E(Y) = 1.)
Chapter 1 Solutions
MyLab Statistics for Business Stats with Pearson eText -- Standalone Access Card -- for Statistics for Business and Economics
Ch. 1 - What is statistics?Ch. 1 - Explain the difference between descriptive and...Ch. 1 - List and define the four elements of a descriptive...Ch. 1 - List and define the five elements of an...Ch. 1 - List the three major methods of collecting data...Ch. 1 - Explain the difference between quantitative and...Ch. 1 - Explain how populations and variables differ.Ch. 1 - Explain how populations and samples differ.Ch. 1 - What is a representative sample? What is its...Ch. 1 - Why would a statistician consider an inference...
Ch. 1 - Explain the difference between a population and a...Ch. 1 - Define statistical thinking.Ch. 1 - Suppose youre given a data set that classifies...Ch. 1 - Suppose that a population contains 200,000...Ch. 1 - The Random Numbers applet generates a list of n...Ch. 1 - The Random Numbers applet can be used to select a...Ch. 1 - Applying the ConceptsBasic 1.15 Performance-based...Ch. 1 - Jamming attacks on wireless networks. Terrorists...Ch. 1 - Disaggregation of annually reported accounting...Ch. 1 - College application data. Colleges and...Ch. 1 - Opinion polls. Pollsters regularly conduct opinion...Ch. 1 - Cybersecurity survey. The information systems...Ch. 1 - Treasury deficit prior to the Civil War. In Civil...Ch. 1 - The lucky store effect in lottery ticket sales. In...Ch. 1 - Consumer recycling behavior. Under what conditions...Ch. 1 - Who is better at multi-tasking? In business,...Ch. 1 - Zillow.com estimates of home values. Zillow.com is...Ch. 1 - Drafting NFL quarterbacks. The National Football...Ch. 1 - The economic return to earning an MBA. What are...Ch. 1 - Corporate sustainability and firm characteristics....Ch. 1 - Inspection of highway bridges. All highway bridges...Ch. 1 - Structurally deficient highway bridges. Refer to...Ch. 1 - Monitoring product quality. The Wallace Company of...Ch. 1 - Guilt in decision making. The effect of guilt...Ch. 1 - Accounting and Machiavellianism. Behavioral...Ch. 1 - Can money spent on gifts buy love? Is the gift you...Ch. 1 - Random-digit dialing. To ascertain the...Ch. 1 - Current population survey. The employment status...Ch. 1 - Monitoring the production of soft-drink cans. The...Ch. 1 - Sampling TV markets for a court case. A recent...Ch. 1 - Critical Thinking Challenge 1.40 20/20 survey...
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