The World Bank collected data on the percentage of GDP that a country spends on health expenditures ("Health expenditure," 2013) and also the percentage of women receiving prenatal care ("Pregnant woman receiving," 2013). The data for the countries where this information is available for the year 2011 are in table #10.1.8. Find the correlation coefficient and coefficient of determination and then interpret both.

Table #10.1.8: Data of Health Expenditure versus Prenatal Care

4. The state funding agency wants to know the percentage of people in their study that have an income below the poverty line of $12,000. In an attempt to answer this question, the researchers from our main study provide a frequency distribution income in tabular form. Below is how they set up their table and plan to present it to the funding agency. (We don’t need the numbers for this table, but the incomes range from $0 to $100,000 with a mean of $22,000 and the median of $10,000.)

Frequency Distribution of Respondents

4A. These research need serious help. What specific rules of constructing frequency distributions are they violating in the way they have set up their table?

4B. What other guidelines have that not followed well. Make two recommendations to revise the table that are not related to the violation of rules you identified in 4A. In other words, other than fixing the violated rules, what else would you recommend they fix.  

1. A good percentage of the portfolio (roughly 20%) is invested in Tenet Healthcare
   With the purpose of diversifying the portfolio, are you in agreement with this decision of investing heavily in the company? Why and why not? If you disagree, what would you recommend?

With the rise of stock market, an investment advisor believes that the percentage of investors who are risk–taking (i.e., trying to take risk in their investment decisions) is greater than 80%. A survey of 115 investors found that 95 of them were risk-taking. Formulate and test the appropriate hypotheses to determine whether his belief can be confirmed (significance level of 5%).

please show work on excel!!!

1. For the five currencies below (£, C$, €, peso, ¥), calculate the percentage change in the rates in the green area below.

Let x be the age of a licensed driver in years. Let y be the percentage of all fatal accidents (for a given age) due to failure to yield the right of way. For example, the first data pair states that 5% of all fatal accidents of 37-year-olds are due to failure to yield the right of way.

Complete parts (a) through (e), given Σx = 372, Σy = 112, Σx² = 24814, Σy² = 3118, Σxy = 8224, and r ≈ 0.955.

(b) Verify the given sums Σx, Σy, Σx², Σy², Σxy, and the value of the sample correlation coefficient r. (Round your value for r to three decimal places.)

(c) Find x, and y. Then find the equation of the least-squares line  = a + bx. (Round your answers for x and y to two decimal places. Round your answers for a and b to three decimal places.)

(d) Graph the least-squares line. Be sure to plot the point (x, y) as a point on the line.

(e) Find the value of the coefficient of determination r². What percentage of the variation in y can be explained by the corresponding variation in x and the least-squares line? What percentage is unexplained? (Round your answer for r² to three decimal places. Round your answers for the percentages to one decimal place.)

(f) Predict the percentage of all fatal accidents due to failing to yield the right of way for 70-year-olds. (Round your answer to two decimal places.)
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Estimating bad debts can be done by the percentage of sales method and the aging of accounts receivable method. each method has its drawbacks and advantages. If the company, you were reviewing used the percentage of sales method and you noted that the allowance shown on the balance sheet was growing disproportionately to the accounts receivable give possible reasons for the disproportionate growth and suggest a means to adjust this situation if necessary. See example below.

Year                                    Accounts Receivable Allowance     Percent of A/R

2014                                         4,500,000                                            450,000     10.0%

2015                                         5,200,000                                            600,000    11.5%

2016 7,500,000 950,000    12.7%

A) If the thickness of the chest is 20 cm, what percentage of X-rays are transmitted through the chest at a certain incident X-ray energy assuming HVL values of 3.5 and 1.8 cm for muscle and bone, respectively, and the bone thickness to be 4 cm and muscle thickness 16 cm.

B) If CT images are acquired at the same X-ray energy as above, calculate the CT numbers for muscle and bone voxels assuming the linear attenuation coefficient of water is 0.1 cm-1

DirectTV is interested in conducting a study to determine the percentage of all their subscribers would be willing to pay $90 per month for a premium cable package. What is the minimum size sample needed to estimate the population proportion with a margin of error of 0.03 or less at 96% confidence?

Macro Economics

As the percentage change in the GDP deflator and inflation are both measures of changes in price levels, what is there a difference between them. with help pg graph