Need assistance with this assignment.

Read the Boffetta et al. (2010) article. Identify any potential threats to internal or external validity in the article. Do you notice any potential problems with the conclusions?

​Vaniteux's Returns​ (B). Spencer Grant is a New​ York-based investor. He has been closely following his investment in400shares of​ Vaniteux, a French firm that went public in February 2010. When he purchased his 400 shares at€18.07 per​ share, the euro was trading at$1.3602/€.​Currently, the share is trading at€27.68per​ share, and the dollar has fallen to $1.4065/€. Spencer considers selling his shares at this time but chooses not to sell them after all. He​ waits, expecting the share price to rise further after the announcement of quarterly earnings. His expectations are​ correct, and the share price rises to €31.17 per share after the announcement. The current spot exchange rate is $1.3231/€.

a. If Spencer sells his shares​ today, what percentage change in the share price would he​ receive?

b. What is the percentage change in the value of the euro versus the dollar over this same​ period?

c. What would be the total return Spencer would earn on his shares if he sold them at these​ rates?

a. If Spencer sells his shares​ today, what percentage change in the share price would he​ receive?

The shareholder return is

72.5072.50​%.

​(Round to two decimal​ places.)

b. What is the percentage change in the value of the euro versus the dollar over this same​ period?

The percentage change in the value of the euro versus the dollar is

nothing​%.

​(Round to two decimal​ places.)

Country Financial, a financial services company, uses surveys of adults age 18 and older to determine if personal financial fitness is changing over time (USA Today, April 4, 2012). In February of 2012, a sample of 1000 adults showed 410 indicating that their financial security was more than fair. In February of 2010, a sample of  900 adults showed 315 indicating that their financial security was more than fair.

What is a 95% confidence interval estimate of the difference between the proportions at the two years, 2012 and 2010?

Group of answer choices

A.(LCL, UCL) = (0.81, 7.11)

B.(LCL, UCL) = (2.08, 5.84)

C.(LCL, UCL) = (1.49, 6.43)

D.(LCL, UCL) = (2.38, 5.54)

It appears that the imports of carbon black have been increasing by about 10% annually.

Determine the logarithmic trend equation. (Round your answers to 4 decimal places.)

By what percent did imports increase, on the average, during the period? (Round your answer to 2 decimal places.)

Imports increased, on average: %

Estimate imports for the year 2023. (Round your intermediate calculations. Round your answer to 2 decimal places.)

Estimated Imports=

It appears that the imports of carbon black have been increasing by about 10% annually.

Determine the logarithmic trend equation. (Round your answers to 4 decimal places.)

By what percent did imports increase, on the average, during the period? (Round your answer to 2 decimal places.)

Imports increased, on average: %

Estimate imports for the year 2023. (Round your intermediate calculations. Round your answer to 2 decimal places.)

Estimated Imports=

Analyze the time-series data of Balance of Payment of China (Since 2010). Discuss the trend of changes in current, capital and financial accounts. Based on your observation, with other external economic information, what shall the policymakers do in responding to these changes?

You required to do.

1. Find the current account, financial account, and capital account of china.

2. Describe thier trends of changes from 2010 to 2019 with evidence

3. Explain why their were such changes.with evidence.

4. Advice policymakers about what shall be done based on the observation.

5. Discuss the balance of Payment detaily.

6 discuss the implications on setting external economic policies and concepts

(Use 1500 words)

Suppose that a simple economy produces only four goods and services: shoes, DVDs, tomatoes, and catsup in 2010. Assume one half of the tomatoes are used in making the catsup and the other half of tomatoes are purchased by households.

.What is the nominal GDP in 2010 for this simple economy?b.In 2011, suppose that the whole tomatoes products were used in making the catsup and atthe same time the price of shoes, DVDs, Tomatoes, Catsup increased three-fold each andtheir respective quantities also increased twice. Calculate Real GDP, GDP deflator and rat eof inflation in 2011?

Researchers suspect that myopia, or nearsightedness, is becoming more common over time. A study from the year 2010 showed 123 cases of myopia in 400 randomly selected people. Another study from the year 2019 showed 228 cases in 600 randomly selected people. We are going to do a hypothesis test to see if p1 = the proportion of people who have myopia in 2019  is equal to p2 = proportion of people who have myopia in 2010 at the 0.05 significance level.

Set up the null and alternative hypothesis

Calculate the test statistic.

What is the critical value?

Should we reject or fail to reject the test under 0.05 level?

What is the correct conclusion based on the test?

KLM Ltd purchased new equipment on 1st January 2010, at a cost of $420 000 net of GST. The company estimated that the equipment had a useful life of 5 years and a residual value of $45 000. Required Assuming a financial year ending 30th June, calculate the amount of depreciation expense for each year ending 30th June 2010 through to 30th June 2015, with each of the following methods: (a) straight line 2 marks (b) sum-of-years-digits 4 marks (c) diminishing balance using the formula 1-(r/c)1/n 4 marks 1- 5 420 000 45 000 = 1 - .64 = 36%

The accompanying data table show the percentage of tax returns filed electronically in a city from 2000 to 2009. Complete parts a through e below.

Year   Percentage
2000   25
2001   33
2002   37
2003   38
2004   48
2005   50
2006   55
2007   59
2008   62
2009   64

a) Forecast the percentage of tax returns that will be electronically filed for 2010 using exponential smoothing with alpha= 0.1.

​b) Calculate the MAD for the forecast in part a.

c) Forecast the percentage of tax returns that will be electronically filed for 2010 using exponential smoothing with trend adjustment. Set alpha= 0.3 and beta= 0.4.

​d) Calculate the MAD for the forecast in part c.