What is the distribution of the random vector [ 𝑋 2 𝑋 3 ] ?单项选择题
A
We cannot determine the distribution, but we can state that 𝜇 = [ 2 3 ] and Σ = [ 1 0 0 4 ] .
B
There is not enough information provided to answer this question.
C
It follows a bivariate normal distribution with 𝜇 = [ 2 3 ] , but Σ is unknown.
D
It follows a bivariate normal distribution with 𝜇 = [ 2 3 ] and Σ = [ 1 0 0 4 ] .
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As yet, technology companies have most commonly adopted the model. There is some concern that their positive experiences may not directly translate to other sectors, for example manufacturing, which requires machines to keep running, a trade counter open to the public and around-the-clock deliveries. Manufacturing workers do not have the option of working from home, as there always needs to be a minimum number of staff on site. Public services also have different business profiles and demands. In these sectors reduced working hours may require overtime payments or additional staffing, which would not be acceptable to most employers. 6. Many firms which have implemented the model have achieved a significant gain in productivity per employee per hour worked. However, it is not clear if these gains in productivity are sustainable for the long term. They require employees to work more intensely, which may not be feasible for employees to maintain over the length of their careers. 7. It is likely that the four-day work week will gradually spread to workplaces and sectors with realistic productivity gains. Employers and sectors that do not offer reduced hours will eventually face difficulties attracting and retaining high-quality employees. They will be forced to reduce work hours so as to continue to run a competitive business. However, the pace of such changes will depend on economic growth, productivity trends, and labour market conditions. 8. The concept of a four-day work week has attracted attention and provided positive outcomes. International companies have displayed the potential benefits of reduced hours in terms of productivity, employee wellbeing and recruitment and retention of key employees. However, challenges remain, including the uncertainty of managers and considerations relating to certain sectors. Continued trials, involving diverse industries, missing from the original trials, will provide valuable insights for decision-makers considering the adoption of the 100:80:100 model. Questions 19–22. Which paragraphs contain the following supporting information? Match the information to the paragraph number.19. An explanation of when the extra day off could be takenAnswer 1 Question 10[select: , Paragraph 1, Paragraph 2, Paragraph 3, Paragraph 4, Paragraph 5, Paragraph 6, Paragraph 7, Paragraph 8]20. An explanation of why improved productivity may not be maintained over time.Answer 2 Question 10[select: , Paragraph 1, Paragraph 2, Paragraph 3, Paragraph 4, Paragraph 5, Paragraph 6, Paragraph 7, Paragraph 8]21. Data to support the success of the model. Answer 3 Question 10[select: , Paragraph 1, Paragraph 2, Paragraph 3, Paragraph 4, Paragraph 5, Paragraph 6, Paragraph 7, Paragraph 8] 22. Reasons that the model is unlikely to be suitable for an industry.Answer 4 Question 10[select: , Paragraph 1, Paragraph 2, Paragraph 3, Paragraph 4, Paragraph 5, Paragraph 6, Paragraph 7, Paragraph 8]
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