Principles of Economics 2e
2nd Edition
ISBN: 9781947172364
Author: Steven A. Greenlaw; David Shapiro
Publisher: OpenStax
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Textbook Question
Chapter 8, Problem 31CTQ
Can you name five examples of
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QUESTION 2
[20]
2.1 Body Mass Index (BMI) is a summary measure of relative health. It is calculated by dividing an
individual's weight (in kilograms) by the square of their height (in meters).
A small sample was drawn from the population of UWC students to determine the effect of exercise
on BMI score. Given the following table, find the constant and slope parameters of the sample
regression function of BMI = f(Weekly exercise hours). Interpret the two estimated parameter
values.
X (Weekly exercise hours) Y (Body-Mass index)
QUESTION 3
2
4
6
8
10
12
41
38
33
27
23
19
Derek investigates the relationship between the days (per year) absent from work (ABSENT) and the
number of years taken for the worker to be promoted (PROMOTION). He interviewed a sample of 22
employees in Cape Town to obtain information on ABSENT (X) and PROMOTION (Y), and derived
the following:
ΣΧ
ΣΥ
341
ΣΧΥ
176 ΣΧ
1187
1012
3.1 By using the OLS method, prove that the constant and slope parameters of the…
QUESTION 2
2.1
[30]
Mariana, a researcher at the World Health Organisation (WHO), collects information
on weekly study hours (HOURS) and blood pressure level when writing a test
(BLOOD) from a sample of university students across the country, before running the
regression BLOOD = f(STUDY). She collects data from 5 students as listed below:
X (STUDY)
2
Y (BLOOD)
4
6
8
10
141
138
133
127
123
2.1.1 By using the OLS method and the information above derive the values for parameters
B1 and B2.
2.1.2 Derive the RSS (sum of squares for the residuals).
2.1.3 Hence, calculate ô
2.2
2.3
(6)
(3)
Further, she replicates her study and collects data from 122 students from a rival
university. She derives the residuals followed by computing skewness (S) equals -1.25
and kurtosis (K) equals 8.25 for the rival university data. Conduct the Jacque-Bera test
of normality at a = 0.05.
(5)
Upon tasked with deriving estimates of ẞ1, B2, 82 and the standard errors (SE) of ẞ1
and B₂ for the replicated data.…
If you were put in charge of ensuring that the mining industry in canada becomes more sustainable over the course of the next decade (2025-2035), how would you approach this? Come up with (at least) one resolution for each of the 4 major types of conflict: social, environmental, economic, and political
Chapter 8 Solutions
Principles of Economics 2e
Ch. 8 - Firms ill a perfectly competitive market are said...Ch. 8 - Would independent trucking fit the characteristics...Ch. 8 - Look at Table 8.13. What would happen to the films...Ch. 8 - Suppose that the market price increases to 6, as...Ch. 8 - Explain in words why a profit-maximizing film will...Ch. 8 - A firms marginal cost curve above the average...Ch. 8 - If new technology in a perfectly competitive...Ch. 8 - A market in perfect competition is in long-run...Ch. 8 - Productive efficiency and allocative efficiency...Ch. 8 - Explain how the profit-maximizing rule of setting...
Ch. 8 - A single firm in a perfectly competitive market is...Ch. 8 - What are the four basic assumptions of perfect...Ch. 8 - What is a price taker firm?Ch. 8 - How does a perfectly competitive firm decide what...Ch. 8 - What prevents a perfectly competitive firm from...Ch. 8 - How does a perfectly competitive film calculate...Ch. 8 - Briefly explain the reason for the shape of a...Ch. 8 - What two rules does a perfectly competitive firm...Ch. 8 - How does the average cost curve help to show...Ch. 8 - What two lines on a cost curve diagram intersect...Ch. 8 - Should a firm shut down immediately if it is...Ch. 8 - How does the average variable cost curve help a...Ch. 8 - What two lines on a cost curve diagram intersect...Ch. 8 - Why does entry occur?Ch. 8 - Why does exit occur?Ch. 8 - Do entry and exit occur in the short run, the long...Ch. 8 - What price will a perfectly competitive firm end...Ch. 8 - Will a perfectly competitive market display...Ch. 8 - Will a perfectly competitive market display...Ch. 8 - Finding a life partner is a complicated process...Ch. 8 - Can you name five examples of perfectly...Ch. 8 - Your company operates in a perfectly competitive...Ch. 8 - Since a perfectly competitive firm can sell as...Ch. 8 - Many films in the United States file for...Ch. 8 - Why will profits for films in a perfectly...Ch. 8 - Why will losses for firms in a perfectly...Ch. 8 - Assuming that the market for cigarettes is in...Ch. 8 - In the argument for why perfect competition is...Ch. 8 - The AAA Aquarium Co. sells aquariums for 20 each....Ch. 8 - Perfectly competitive firm Doggies Paradise Inc....Ch. 8 - A computer company produces affordable,...
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Similar questions
- How is the mining industry related to other Canadian labour industries? Choose one other industry, (I chose Forestry)and describe how it is related to the mining industry. How do the two industries work together? Do they ever conflict, or do they work well together?arrow_forwardWhat is the primary, secondary, tertiary, and quaternary levels of mining in Canada For each level, describe what types of careers are the most common, and describe what stage your industry’s main resource is in during that stagearrow_forwardHow does the mining industry in canada contribute to the Canadian economy? Describe why your industry is so important to the Canadian economy What would happen if your industry disappeared, or suffered significant layoffs?arrow_forward
- What is already being done to make mining in canada more sustainable? What efforts are being made in order to make mining more sustainable?arrow_forwardWhat are the environmental challenges the canadian mining industry face? Discuss current challenges that mining faces with regard to the environmentarrow_forwardWhat sustainability efforts have been put forth in the mining industry in canada Are your industry’s resources renewable or non-renewable? How do you know? Describe your industry’s reclamation processarrow_forward
- How does oligopolies practice non-price competition in South Africa?arrow_forwardWhat are the advantages and disadvantages of oligopolies on the consumers, businesses and the economy as a whole?arrow_forward1. After the reopening of borders with mainland China following the COVID-19 lockdown, residents living near the border now have the option to shop for food on either side. In Hong Kong, the cost of food is at its listed price, while across the border in mainland China, the price is only half that of Hong Kong's. A recent report indicates a decline in food sales in Hong Kong post-reopening. ** Diagrams need not be to scale; Focus on accurately representing the relevant concepts and relationships rather than the exact proportions. (a) Using a diagram, explain why Hong Kong's food sales might have dropped after the border reopening. Assume that consumers are indifferent between purchasing food in Hong Kong or mainland China, and therefore, their indifference curves have a slope of one like below. Additionally, consider that there are no transport costs and the daily food budget for consumers is identical whether they shop in Hong Kong or mainland China. I 3. 14 (b) In response to the…arrow_forward
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