A clinical trial was conducted using a new method designed to increase the probability of conceiving a boy. As of this? writing, 281 babies were born to parents using the new? method, and 243 of them were boys. Use a 0.05 significance level to test the claim that the new method is effective in increasing the likelihood that a baby will be a boy. Identify the null? hypothesis, alternative? hypothesis, test? statistic, P-value, conclusion about the null? hypothesis, and final conclusion that addresses the original claim. Use the? P-value method and the normal distribution as an approximation to the binomial distribution. How do you find the P value using a TI-84 calculator?

A clinical trial was conducted using a new method designed to increase the probability of conceiving a boy. As of this? writing, 278 278 babies were born to parents using the new? method, and 252 252 of them were boys. Use a 0.05 0.05 significance level to test the claim that the new method is effective in increasing the likelihood that a baby will be a boy. Identify the null? hypothesis, alternative? hypothesis, test? statistic, P-value, conclusion about the null? hypothesis, and final conclusion that addresses the original claim. Use the? P-value method and the normal distribution as an approximation to the binomial distribution. test statistic is z= round 2 decimal places

The Cambridge Study of delinquent development was undertaken in N. London to investigate the links between criminal behavior in young men and socioeconomic factors of the upbringing. A cohort of 395 boys was followed for about 20 years starting at the age of 8 or 9. All boys attended 6 schools located near the research office.

The table below provides the following summary statistics relating family income and convictions.

Income level

• Can we consider the cohort of these boys to be a random sample of a certain portion of the male youth of UK?
• What is the necessary assumption that needs to be made about the income group assignment of these boys for the duration of the study?
• Identify the random variables of the data set. What is the type of these variables?
• Construct the appropriate plot of these data.
• Do the two random variables seem to have an association? Which one can be used as explanatory?           

The Cambridge Study of delinquent development was undertaken in N. London to investigate the links between criminal behavior in young men and socioeconomic factors of the upbringing. A cohort of 395 boys was followed for about 20 years starting at the age of 8 or 9. All boys attended 6 schools located near the research office.

The table below provides the following summary statistics relating family income and convictions.

Income level

• Can we consider the cohort of these boys to be a random sample of a certain portion of the male youth of UK?
• What is the necessary assumption that needs to be made about the income group assignment of these boys for the duration of the study?
• Identify the random variables of the data set. What is the type of these variables?
• Construct the appropriate plot of these data.
• Do the two random variables seem to have an association? Which one can be used as explanatory?  

This video describes BancoSol, Latin America’s first commercial microfinance bank that is known both nationally and internationally. It walks the viewer through the growth process of the bank both in terms of its deposit and loan portfolios. Activity Instructions Why is microfinance important? How is a commercial microfinance bank different from a traditional commercial bank? What were the challenges faced by BancoSol in growing its loan portfolio? Also, what new products did BancoSol have to design in order to maintain the growth rate of its loan portfolio?

Stewart County School District is about to raise funds for a new school through a bond issue. The plan is to raise $3,475,000 with a 2.85% coupon, 10-year bond. The underwriter indicates the bonds will be sold at a price of $101.15 per $100. The yield to maturity on the bond is:

A public school district is investigating whether to purchase a new school bus to take over the rural-most route in the district. They have two options:

A modern, eco-friendly bus complete with seat belts and air conditioning, will have a first cost of $95,000, cost savings (in terms of fuel efficiency and maintenance costs) of $20,000/year the first year, and decreasing by $1000 per year thereafter (so $19,000 the second year, 18,000 the third year, etc…). It’s estimated that the salvage value will be $8,000 at the end of its 20 year life.

A more basic bus will have a first cost $70,000, cost savings of $14,000 per year decreasing by $500 per year each year thereafter (so $13,500 the second year, $13,000 the third year, etc.).It is estimated that the salvage value will be $5000 at the end of its 20-year life.

Assume that the school district also has the option to stay with their current fleet (so the do nothing option is also available).

A) Use Benefits to Costs analysis to determine which of the options, if any, would be most economical for the school district if their MARR is 5%.

B) Compute the value of X- i.e., the first cost of the modern bus- that makes the two alternatives in this example equally desirable:

C) In this problem only the economic consequences were evaluated. Do you think this type of decision is only economic, or are there other factors that could/would/should be considered? Briefly discuss…

(if using excel please provide code)

How does culture influence politics and security issues in Latin America? Please provide specific examples?