7.
The data in the Excel spreadsheet linked below gives the average monthly price of gold (in dollars per ounce) for the years 1980 to1983.
Which of the following statistics measures gold price variation in the same units as gold price itself (i.e., dollars per ounce)?
The standard deviation.
The variance.
The coefficient of variation.
None of the above.

Price of Gold (in $ per ounce) 


Month 
1980 
1981 
1982 
1983 

Jan 
675.30 
557.38 
384.38 
481.29 

Feb 
665.32 
499.76 
374.13 
491.96 

Mar 
553.58 
498.76 
330.04 
419.70 

Apr 
517.41 
495.80 
350.34 
432.93 

May 
513.82 
479.69 
333.82 
438.08 

Jun 
600.71 
464.76 
314.98 
412.84 

Jul 
644.28 
409.28 
338.97 
422.72 

Aug 
627.14 
410.15 
364.23 
416.24 

Sep 
673.62 
443.58 
435.76 
411.80 

Oct 
661.14 
437.75 
422.15 
393.58 

Nov 
623.46 
413.36 
414.91 
381.66 

Dec 
594.92 
410.09 
444.30 
389.36 
9.
bizneznuz.com, an online business news agency, conducts a poll. Visitors to the site are invited to click on one of two buttons in order to register that they “agree” or “disagree” with the following statement: “Funding for space exploration should be left entirely to the private sector.”
If bizneznuz.com wants to accurately measure its online readership’s support for governmentfunded space exploration, this poll will deliver a biased and unrepresentative response because:
The pool of respondents is selfselected.
All respondents have internet access.
bizneznuz.com targets mainly the business community.
All of the above.
12.
The average height of American women is distributed normally, with a mean of 63.5 inches and a standard deviation of 2.5 inches.
Approximately what percentage of American women are taller than 58.5 inches, but shorter than 68.5 inches?
50%
68%
84%
95%
13.
The histogram below displays the distribution of income among households in the United States in 2001. Suppose a researcher takes a random sample of 60 households and calculates average household income in the sample. Suppose 99 other researchers conduct identical studies, each independently collecting a random sample of 60 households and computing the average household income in that sample.
Which of the following best describes the distribution of the 100 different average household incomes calculated by the researchers?
Symmetric with one peak.
Symmetric with two peaks.
Skewed left.
Skewed right.
21. In a survey of 48 citizens, 36 registered strong disapproval with their government’s economic leadership. In the previous month, the proportion of participants registering strong disapproval was 65%.
At the 95% confidence level and using a twosided test, which of the following statements do these data support?
There is not sufficient evidence to indicate that the proportion of participants registering strong disapproval has changed.
The proportion of participants registering strong disapproval has increased.
The proportion of participants registering strong disapproval has stayed the same.
None of the above.
22.
A telemarketing company wants to find out if people are more likely to answer the phone between 8pm and 9pm than between 7pm and 8pm. Out of 96 calls between 7pm and 8pm, 72 were answered. Out of 105 calls between 8pm and 9pm, 90 were answered.
Using a onesided hypothesis test with a 90% confidence level, which of the following statements do these data support?
There is not sufficient evidence that the proportion of people who answer the phone between 8pm and 9pm is greater than the proportion who answer the phone between 7pm and 8pm.
People are more likely to answer the phone between 8pm and 9pm.
Telemarketers should not call at all during the evenings.
People are more likely to answer the phone between 7pm and 8pm.
23.
The regression analysis below relates US annual energy consumption in trillions of BTUs to the independent variable “US Gross Domestic Product (GDP) in trillions of dollars.”
Which of the following is the lowest level at which the independent variable is significant?
0.94
0.10
0.05
0.01
24. The regression analysis below relates US annual energy consumption in trillions of BTUs to the independent variable “US Gross Domestic Product (GDP) in trillions of dollars.”
The coefficient on the independent variable tells us that:
For every additional trillion dollars of GDP, average energy consumption increased by 3,786 trillion BTUs.
For every additional dollar of GDP, average energy consumption increased by 3,786 trillion BTUs.
For every additional trillion dollars of GDP, average energy consumption increased by 3,786 BTUs.
For every additional trillion BTUs of energy consumption, average GDP increased by $3,786 trillion.
25.
The regression analysis below relates US annual energy consumption in trillions of BTUs to the independent variable “US Gross Domestic Product (GDP) in trillions of dollars.”
Which of the following statements is true?
The yintercept of the regression line is 62,695 trillion BTUs.
The xintercept of the regression line is $62,695 trillion.
In the event that a thermonuclear war completely halts all economic activity and the US GDP drops to zero, energy consumption will sink to 62,695 trillion BTUs.
None of the above.
26.
The regression analysis below relates US annual energy consumption in trillions of BTUs to the independent variable “US Gross Domestic Product (GDP) in trillions of dollars.”
In a given year, if GDP is $7.4 trillion, expected energy consumption is:
Around 90,711 trillion BTUs
Around 91,501 trillion BTUs
Around 28,016 trillion BTUs
Around 467,729 trillion BTUs.
27.
The regression analysis below relates US annual energy consumption in trillions of BTUs to the independent variable “US Gross Domestic Product (GDP) in trillions of dollars.”
How much of the variation in energy consumption can be explained by variation in the gross domestic product?
About 94%
About 97%
About 99.99%
Almost none of the variation in energy consumption can be explained by variation in GDP.
30.
The data table below tabulates a pizza parlor’s advertising expenditures and sales for 8 consecutive quarters. The marketing manager wants to know how much of an impact current advertising will have on sales two quarters from now.
When running a regression with the dependent variable “sales” and the independent variable “advertising lagged by two quarters,” how many data points can she use, given the available data?
6
7
8
9
31.
In a regression analysis, a residual is defined as:
The difference between the actual value and the predicted value of the dependent variable.
The difference between the actual value and the predicted value of the independent variable.
The proportion of the variation in the independent variable that remains unexplained by the variation in the dependent variable.
The proportion of the variation in the dependent variable that remains unexplained by the variation in the independent variable.
32.
When comparing two regression analyses that have a different number of independent variables, which of the following should be used to compare the explanatory power of the two regressions?
Adjusted Rsquared.
Rsquared.
The correlation coefficient (“Multiple R”).
None of the above.
33.
Amalgamated Fruits, Vegetables, and Legumes, an agricultural company, breeds the experimental fruit “kiwana.” The company is studying the effects of a new fertilizer on the number of kiwanas per bunch grown on kiwana trees. The regression analysis below relates the number of kiwanas per bunch to the independent dummy variable “fertilizer.”
Based on the regression, which of the following statements may be concluded?
On average, the use of the new fertilizer increases the number of kiwanas per bunch by 5.25.
The independent dummy variable “fertilizer” is significant at the 0.01 level.
Variation in the independent dummy variable “fertilizer” explains around 53% of the variation in the number of kiwanas per bunch.
None of the above.
35.
Market researcher Ally Nathan is studying the relationships among price, type (classical or steel string), and consumer demand for acoustic guitars. She wants to find the relationship between demand and price, controlling for type.
To determine this relationship, she should:
Run a simple regression of the dependent variable demand on the independent variable price and observe the coefficient on price.
Run a simple regression of the dependent variable demand on the independent variable type and observe the coefficient on type.
Run a multiple regression of the dependent variable demand on the independent variables price and type and observe the coefficient on price.
Run a multiple regression of the dependent variable demand on the independent variables price and type and observe the coefficient on type.
36. The table below displays data on defect rates at a compact disk (CD) pressing facility. The table includes data on the distribution of CDs that have content errors (missing and/or wrong content), and on the distribution of CDs that have labeling errors.
What is the probability that a randomly selected CD has a content error?
1.00%
0.98%
0.02%
None of the above.
37.
The table below displays data on defect rates at a compact disk (CD) pressing facility. The table includes data on the distribution of CDs that have content errors (missing and/or wrong content), and on the distribution of CDs that have labeling errors.
What is the conditional probability that a CD has no content errors, given that has a labeling error?
97.02%
1.98%
98.00%
None of the above.
39.
The WH meatpacking company must decide whether or not to recall one week’s production of kielbasa due to possible contamination. An outbreak of nonfatal food poisoning may be linked to WH. If so, WH may face a lawsuit. The tree below summarizes the decision.
What is the expected monetary value of the cost of not issuing a recall?
$80,000
$120,000
$800,000
$0
Try it now!
How it works?
Follow these simple steps to get your paper done
Place your order
Fill in the order form and provide all details of your assignment.
Proceed with the payment
Choose the payment system that suits you most.
Receive the final file
Once your paper is ready, we will email it to you.
Our Services
Do My Homework has assembled a team of highly skilled writers with diverse experience in the online writing circles. Our aim is to become a one stop shop for all your Academic/ online writing. Check out below our amazing service!
Essays
At Do My Homework, we prioritize on all aspects that creates a good grade such as impeccable grammar, proper structure, zeroplagiarism, and conformance to guidelines. The principal purpose of essay writing is to present the author's evaluation concerning a singular subject about which they have made. Since Professionalism is the mother of every success, try our team of experienced writers in helping you complete your essays and other assignments.
Admissions
Admission Papers
You have been trying to join that prestigious institution you long yearned for, but the hurdle of an admission essay has become a stumbling block. We have your back, with our proven team that has gained invaluable experience over time, your chance of joining that institution is now! Just let us work on that essay.How do you write an admission essay? How do you begin the essay? For answers, try Quality Custom Writers Now!
Editing
Editing and Proofreading
Regardless of whether you're pleased with your composing abilities, it's never an impractical notion to have a second eye go through your work. The best editing services leaves no mistake untouched. We recognize the stuff needed to polish up a writing; as a component of our editing and proofreading, we'll change and refine your write up to guarantee it's amazing, and blunder free. Our group of expert editors will examine your work, giving an impeccable touch of English while ensuring your punctuation and sentence structures are topnotch.
Coursework
Technical papers
We pride ourselves in having a team of clinical writers. The stringent and rigorous vetting process ensures that only the best persons for job. We hire qualified PhD and MA writers only. We equally offer our team of writers bonuses and incentives to motivate their working spirit in terms of delivering original, unique, and informative content. They are our resources drawn from diverse fields. Therefore your technical paper is in the right hands. Every paper is assessed and only the writers with the technical knowhow in that field get to work on it.
Coursework
College Essay Writing
If all along you have been looking for a trustworthy college essay service provider that provides superb academic papers at reasonable prices, then be glad that you search has ended with us. We are your best choice! Get highquality college essay writing from our magnificent team of knowledgeable and dedicated writers right now!
Coursework
Quality Assignment/Homework Help
We give the students premium quality assignments, without alarming them with plagiarism and referencing issues. We ensure that the assignments stick to the rules given by the tutors. We are specific about the deadlines you give us. We assure you that you will get your papers well in advance, knowing that you will review and return it if there are any changes, which should be incorporated.