Q. A certain amino acid has the following elemental composition: C, H, O, N. In a combustion analysis, 3.263g of it was combusted to produce 5.910g of CO2 and 2.835g of H2O. Separate analysis determined that it is 19.17% N, and its molar mass is 150g/mol. Determine its empirical and molecular formula.

Why have development economists emphasized the importance of (a) the proportion of national income that is saved and (b) the rate of growth of the population (or labor force)? Illustrate your ideas with discussion of the Harrod–Domar or Cobb–Douglas economic growth models. Also draw on empirical evidence about savings proportions, as presented on the textbook.

17. 1.42 g of a compound containing carbon, hydrogen and oxygen (CXHYOZ) is subjected to combustion analysis. The results show that 1.95 g of CO2 and 1.68 g of H2O were produced. What is the empirical formula for the compound? If the molecular weight of the compound is 160 g/mol, what is the molecular formula of the compound?

Discuss the various theories related to the term structure of interest rates. What are the strengths and weaknesses of each of these approaches. What are the implications of the empirical results related to the term structure? What are some of the reasons that we could have a downwardly sloped yield curve? What are the implications of a downwardly sloped yield curve?

1. Explain the nature of convertible loan stock and the rationales for the company to issue it.                     

2. Explain the empirical evidence of contrarian strategy on market over-reaction in the context of weak and semi-strong form efficiency.        
3. Critically discuss the features of Funds of Funds and explain any other three (3) types of hedge fund strategies.                 

Select a psychological disorder (your choice, depression, anxiety, ADHD, etc.). Summarize two theoretical/empirical perspectives of the disorder you selected (e.g., Psychoanalytic, Humanistic, Behavioral, Social Learning Theory, Neuropsychological, psychosocial, etc.).

Critically compare and discuss the implications of these two perspectives on understanding the disorder of focus

In a certain article, laser therapy was discussed as a useful alternative to drugs in pain management of chronically ill patients. To measure pain threshold, a machine was used that delivered low-voltage direct current to different parts of the body (wrist, neck, and back). The machine measured current in milliamperes (mA). The pretreatment experimental group in the study had an average threshold of pain (pain was first detectable) at μ = 3.28 mA with standard deviation σ = 1.26 mA. Assume that the distribution of threshold pain, measured in milliamperes, is symmetric and more or less mound-shaped. (Round your answers to two decimal places.) (a) Use the empirical rule to estimate a range of milliamperes centered about the mean in which about 68% of the experimental group will have a threshold of pain from mA to mA (b) Use the empirical rule to estimate a range of milliamperes centered about the mean in which about 95% of the experimental group will have a threshold of pain from mA to mA

1.Weights of Old English Sheepdogs are normally distributed with a mean of 63 pounds and a standard deviation of 3 pounds. Using the Empirical Rule, what is the approximate percentage of sheepdogs weighing between 60 and 66 pounds?

2.Pro golf scores are bell-shaped with a mean of 70 strokes and a standard deviation of 4 strokes. Using the empirical rule, in what interval about the mean would you expect to find 99.7% of the scores?

3. Running times in a daily workout have a mean of 36 minutes and a standard deviation of 7 minutes. The distribution is unknown. Using Chebyshev's Rule, in what interval about the mean would you expect to find at least 89% of the workout times?

4. A distribution of tire pressures(psi) has the following 5-number summary. What percentage of data is between 42 and 87 ?

Suppose that in a large population of students, the mean amount of sleep the previous night was μ = 7.15 hours and the standard deviation was σ = 1.5 hours. Consider randomly selected samples of n = 240 students.

(a) What is the value of the mean of the sampling distribution of possible sample means?
Mean =  

(b) Calculate the standard deviation, s.d., of the sampling distribution of possible sample means. (Round your answer to three decimal places.)

s.d.(x)

=

(c) Use the Empirical Rule to find values that fill in the blanks at the end of the following sentence. (Round your answers to three decimal places.)

For 68% of all randomly selected samples of n = 240 students, the mean amount of sleep the previous night will be between  and  hours.

(d) Use the Empirical Rule to fill in the blanks at the end of the following sentence. (Round your answers to three decimal places.)

For 95% of all randomly selected samples of n = 240 students, the mean amount of sleep will be between  and  hours.

In one or two sentences, explain what is meant by each of the following terms when working with or designing a database. Primary key , Composite key, One-to-many relationship Data integrity

Accountin Information system