Questions
McAllister et al. (2012) compared varsity football and hockey players with varsity athletes from noncontact sports...

McAllister et al. (2012) compared varsity football and hockey players with varsity athletes from noncontact sports to determine whether exposure to head impacts during one season have an effect on cognitive performance. In their study, tests of new learning performance were significantly poorer for the contact sport athletes compared to the noncontact sport athletes.

The following presents data similar to the results obtained. Data are the scores of a neurological test. Higher scores indicate better performance.

Type of sport

Noncontact Sport Athletes Contact Sports Athletes
10, 8, 7, 9, 13, 7, 6, 12 7, 4, 9, 3, 7, 6, 10, 2

Computations by hand

a. What are IV and DV in this study?

b. Compute the mean and the standard deviation for each condition (show your work). (use the definition formula to compute each SS)

c. Are the neurological test scores for contact sport athletes significantly different from the neurological test scores for noncontact sport athletes? Use a two-tailed test with α = .05.

1) State the null hypothesis in words and in a statistical form.

2) State the alternative hypothesis in words and a statistical form.

3) Compute the appropriate statistic to test the hypotheses. Sketch the distribution

with the estimated standard error and locate the critical region(s) with the critical value(s).

4) State your statistical decision

5) Compute Cohen’s d. Interpret what the d really means in this context.  

6) Compute 95% CI (2).

7) What is your conclusion? Interpret the results. Do not forget to include a statistical form (e.g., t-score, df, α, Cohen’s d)

In: Statistics and Probability

respond to the following questions about the Columbian Exchange: What were the two most important items...

respond to the following questions about the Columbian Exchange:

  1. What were the two most important items exchanged that came from the Old World to the New World? Why were they so important?
  2. What were the two most important items exchanged that came from the New World to the Old World? Why were they so important?
  3. What was the most significant problem caused or liability introduced in the Old World and in the New World by the Columbian Exchange? Explain.
  4. In your opinion, was the overall impact of the Columbian Exchange positive or negative? In other words, would the earth have been better off without this exchange? As you discuss your perspective, explain both the major positive and negative effects that guide your opinion.

In: Psychology

Considering comorbidity, why must it matter to us how and why addiction and mental disorders often...

Considering comorbidity, why must it matter to us how and why addiction and mental disorders often go hand in hand? What does the prevalence of comorbidity say about the human condition? Use Scripture to support your answers if possible.

In: Psychology

9) Describe the ACL analysis? How can ACL tools and techniques be used in an audit?...

9) Describe the ACL analysis? How can ACL tools and techniques be used in an audit? Be specific and use examples to support your answer. What did you learn about ACL that you found to be most useful with respect to IT Audit?

In: Accounting

Demand for copper from the Red Dog mine is steady over time, at p = 1000...

Demand for copper from the Red Dog mine is steady over time, at p = 1000 - q for both this year and next year (where p is the price in dollars per ton and q is the number of tons). Your marginal cost of mining and marketing copper is constant at $100 per ton, and your discount rate is r = 0.05. You can price like a monopolist but your available supply is only S = 600 tons that can be marketed this year and next.

A. Write the two conditions that you would use to solve for the specific quantities 0 q and 1 q that maximize your profits over the two periods. (You don’t actually have to solve for them.)

B. Using the information in part (a), develop an equation that explains how marginal net benefits in year 1 depend on marginal net benefits in year 0.

In: Economics

Suppose you are a currency speculator trying to forecast what will happen to the value of...

  1. Suppose you are a currency speculator trying to forecast what will happen to the value of the dollar over the next year. Suppose all of our usual theories hold (uncovered, covered and real interest rate parities, absolute and relative purchasing power parities, as well as the Fisher effect for nominal interest rates).

For each of the separate cases below, use the information in that case to compute the expected depreciation of the dollar , or state if there is not enough information. State the name of the parity condition(s) you use and show your work.

  1. Expected inflation over the next year is expected to be 1% in the U.S. and -1% in Europe.
  2. The nominal interest rate in the U.S. for a 1-year dollar deposit is 3%, and that for a euro deposit is 2%.
  3. The current spot exchange rate is 1 dollar per euro, and the forward rate for a year from now is 1.1 dollars per euro.

In: Economics

ROI Department A release of information (ROI) department or division is found in virtually every hospital....

ROI Department

A release of information (ROI) department or division is found in virtually every hospital. HIPAA and State guidelines strongly direct the rules and regulations of patient information. ROI departments perform such tasks as obtaining patient consent, certifying medical records, and deciding what information can be released. The ROI department is often found within the health information management department of a hospital.

Review the information provided about ROI at the AHIMA website: http://bok.ahima.org/doc?oid=85544#.WUFWhj-GMuQ

In your own words, construct a 2-3 page APA-formatted synopsis of the main points of this information. Remember to cite your resources.

In: Computer Science

Take one of the scenarios and analyze in detail (with all the intuition for all the...

Take one of the scenarios and analyze in detail (with all the intuition for all the moves) each market (labeling every graph and axes completely)

1) Flexible Exchange Rate and Expansionary Fiscal Policy 2) Flexible Exchange Rate and Contractionary Fiscal Policy

Show on the graph and explain.

In: Economics

There are different methods to account for carbon emissions such as IFRIC 3 Approach, Net Liability...

There are different methods to account for carbon emissions such as IFRIC 3 Approach, Net Liability Approach and Government Grant Approach. Explain in detail how each of those accounting methods will impact the financial statement and financial performance of a company. (i.e. assets, liabilities , equity, income and expenses ).

In: Accounting

ANSWER THESE IN 650 WORDS. 1. Describe the roles of conventional health care providers. 2. Detail...

ANSWER THESE IN 650 WORDS.

1. Describe the roles of conventional health care providers.
2. Detail the practice settings that exist across Canada.
3. Explain the purpose of primary health care reform.
4. Describe the structure and function of primary health care groups in Canada.

In: Nursing