A psychologist is interested in knowing whether adults who were bullied as children differ from the general population in terms of their empathy for others. On a questionnaire designed to measure empathy, the mean score for the general population is 80.82. Random sampling of 76 scores obtained from individuals who were bullied yielded a mean of 66.42 and a standard deviation of 22.87.

Suppose you want to calculate the 99% confidence interval.

In a survey of 1500 U.S. workers who are working from home, 885 of them would prefer to keep doing so after restrictions are lifted. Construct a 99% confidence interval for the population proportion of U.S workers who would like to keep working from home.

The number? H(t) of veterans from foreign wars who are homeless or at risk of becoming homeless can be approximated by the exponential? function,

H(t)=65(1.65)^t where t is the number of years since 2000.

?a) In what year were there 14,000 veterans who were homeless or at risk of becoming? homeless?

?b) What is the doubling time of homelessness among? veterans?

It has been determined, with 90% confidence, that the proportion of students who graduate from college are able to find a job in their field of study lies between 64% and 83%. Using this information answer the following questions.

What is the sample proportion?
What is the margin of error?
Interpret this confidence interval in the context of this problem.
​​​​​​​​​​​​​​What would happen to this interval if the confidence level were to increase to 95%?

. A columnist for the Wall Street Journal observes: “No one collects money from those who benefit from the food control a wetland provides, or the nutrient recycling a forest does… In a nutshell, market failures help drive habitat loss.” What does the columnist mean by market failures? What does she mean by habitat loss? Explain why she believes one is causing the other. Illustrate your argument with a graph showing the market for land to be used for development.

Who are the inspiring leaders from healthcare and what makes them inspirational? Be sure to first offer a brief framework, based on relevant reference materials, that explore the concepts related to motivation, inspiration, and leadership.

The average starting salary of students who graduated from colleges of Business in 2009 was $48,400. A sample of 100 graduates of 2010 showed an average starting salary of $50,000. Assume the standard deviation of the population is known to be $8000. We want to determine whether or not there has been a significant increase in the starting salaries. Step 1. Statement of the hypothesis (1.5 marks) Step 2. Standardized test statistic formula (1 mark) Step 3. State the level of significance (1 mark) Step 4. Decision Rule (Draw a bell to show rejection zone) Step 5. Calculation of the statistic Step 6. Conclusion (1.5 marks)

Question 2

Harold is a 62 year old man who was found to be suffering from depression one year after a diagnosis of heart failure. Sertraline was added to his current prescription of irbesartan.

a) Compare the mechanism of action and clinical effects of these two drugs.

b) A move to a healthy lifestyle is recommended for people with heart failure. Discuss how the adverse effects of antidepress medication may interfere with this.

Explain the pathophysiology of acute renal failure in a patient who is suffering from severe haemorrhage resulting from a motor vehicle accident.