Practice problems 1 – Type of variables
1. In the following situations give an example of a parameter and a statistic

a. Political elections
b. Subaru 2020 Forester vehicles c. RUM students
d. Puerto Ricans

2. You are in charge of a local company who wants to obtain mean income of the company’s engineers to compare with the mean income of engineers in the industry. You can either obtain the population mean (parameter) or a sample mean (statistic) to reach a managerial conclusion (both describing the same property, and assume both are feasibly possible to get). Which one would you rather use? Explain

3. Determine the type of variable in the following problems (Nominal, ordinal, quantitative). If quantitative state if it is discrete or continuous

a. Times power outages occur in Mayaguez Terrace last December b. Level of attraction of a person (de feo(a) a guapísimo(a))
c. Volume of chocolate by 25 kids sampled in October.
d. Sustained winds of hurricane Irene in the last 24 hours.

e. Placing at a marathon
f. Cell phone ownership (Yes, No) by citizens who are 50 or older

5. Of the examples above mention one that describes a parameter and one that describes a statistic.

Firstly, I wasn't sure exactly where to put this. It's a typesetting query but the scope is greater than TEX; however it's specific also to physics and even more specific to this site.

I've recently been reading a style guide for scientific publications (based on ISO 31-11), however there was no mention of quantum mechanical operators. I've seen them written a few ways and was wondering if there was a decision handed down from "up above" that any particular way is best.

H -- I see this most commonly but I suspect it's mostly due to (mild) laziness to not distinguish it from a variable.
H^ -- This is nicer to me because it makes the distinction between operator and variable. From what I understand of the ISO the italic means it's subject to change, which is true of the form of an operator, but not really its meaning? So I'm not totally sure if that's appropriate here.
H -- Roman lettering is used for functions e.g. sinx, erf(x), and even the differential operator (as in ddx) so this seems to me like the most suitable category to put operators in.
H^ -- Probably the least ambiguous but may also be redundant.

Which would be the best to use? Am I being too pedantic?

Physical Therapy Center Assignment

1. The operation will receive an interest free, non-amortizing loan of

$ 400,000 from the home office.

2. The pre-opening start up costs are $71,429 which will be

“capitalized” (treated as P,P,& E).

3. The investment in property, plant and equipment (AKA

technology) is $ 285,714 .

Assignment: Prepare the Cash Flow Proforma for 5 years based on

the above assumptions and Proforma Results of Operations posted on

Angel. What is the ending Cash balance?

If you deposit $500 from year 1 to year 5, $300 from year 6 to year 20, no deposits year 21 and year 22, and $700 in year 22. If the discount rate is 5%, what is the present value? Please show all steps

Visby Rides, a livery car company, is considering buying some new luxury cars. After extensive research, they come up with the above estimates of free cash flow from this project. By how much could the discount rate rise before the net present value (NPV) of this project is zero, given that it is currently 10%?

12

17

22

27

ou are given the following stream of cash flows: Year 1 Year 2 Year 3 Year 4 Year 5 $100,000 $110,000 $120,000 $130,000 $140,000 A. If you thought the appropriate discount rate was 10%, what would be the present value of this cash flow stream today at t=0? B. If you thought the appropriate interest/discount rate was 10%, what would be the future value of this cash flow stream in five years at t=5 years?

Assignment: Finance and Operations This week we look at finance and operations, and apply a bit of quantitative analysis to the effort. Your assignment is to analyze current financial ratios for a given business. 1. Think of a specific business you find interesting, i.e. Apple, UTC, Southwest Airlines, etc. 2. Search the web for that business’ “Financial Statement.” (You will find many hits for the data.) 3. Select the http://www.morningstar.com/ site offering your company’s financial statement. 4. You will now see a number of financial ratios for your company. Below is an example for Apple: http://financials.morningstar.com/ratios/r.html?t=AAPL 5. Now, define the following ratios, note the ratio for your business, and explain what the ratio means for the business moving forward: a) Return on Assets b) Return on Equity c) Return on Capital d) Gross Margin e) SG&A Margin f) Current Ratio g) Quick Ratio h) Total Debt/Equity i) Total Revenue j) Gross Profit Here are some additional resources: Apple (Return on Assets): https://ycharts.com/companies/AAPL/return_on_assets Ratios: https://www.stock-analysis-on.net/NASDAQ/Company/Apple-Inc/Ratios/Profitability/Quarterly-Data#Ratios-Summary Use the following guidelines: Use APA format with a title page, in-text citations and references. No abstract required. Research and cite at least 2 credible sources in APA format. Upload your assignment to the Assignment link by Sunday at 11:59 pm (EST)

Assignment: Finance and Operations This week we look at finance and operations, and apply a bit of quantitative analysis to the effort. Your assignment is to analyze current financial ratios for a given business. 1. Think of a specific business you find interesting, i.e. Apple, UTC, Southwest Airlines, etc. 2. Search the web for that business’ “Financial Statement.” (You will find many hits for the data.) 3. Select the http://www.morningstar.com/ site offering your company’s financial statement. 4. You will now see a number of financial ratios for your company. Below is an example for Apple: http://financials.morningstar.com/ratios/r.html?t=AAPL 5. Now, define the following ratios, note the ratio for your business, and explain what the ratio means for the business moving forward: a) Return on Assets b) Return on Equity c) Return on Capital d) Gross Margin e) SG&A Margin f) Current Ratio g) Quick Ratio h) Total Debt/Equity i) Total Revenue j) Gross Profit Here are some additional resources: Apple (Return on Assets): https://ycharts.com/companies/AAPL/return_on_assets Ratios: https://www.stock-analysis-on.net/NASDAQ/Company/Apple-Inc/Ratios/Profitability/Quarterly-Data#Ratios-Summary Use the following guidelines: Use APA format with a title page, in-text citations and references. No abstract required. Research and cite at least 2 credible sources in APA format. Upload your assignment to the Assignment link by Sunday at 11:59 pm (EST)

#1. Impact Evaluation

   In the move to online instruction due to COVID-19, Development University was concerned that its students may not have the technology they needed at home to keep up with their classes. In order to address this issue, at the start of the term, the University offered all students coupons for a 50% price discount on a new iPad. The hope was that the iPad would allow students to participate more fully in their online classes, and therefore allow them to learn more.

    Development University heard that you have learned how to do impact evaluation in your economics classes, so asked you to evaluate how well the iPads worked for their students. In particular, they wanted to know if the iPads caused student grades to improve. In looking at the data, you notice that although all students were offered the coupon, only half of them purchased an iPad through the program. Therefore, you decide to compare the average GPAs of students who purchased an iPad to those who didn't. You find that students who purchased an iPad had an average GPA of 3.4, and students who did not purchase an iPad had an average GPA of 3.1.

1) Explain in words one sentence that clearly describes the context of this study. (The answer should clearly define the treatment and the outcome variable in this study, not just the abstract language of what y0i means in general.)

2) Please explain and describe ?[?1?|??=0] in the context of this study. (The answer should demonstrate a clear understanding of both the treatment and the outcome variable in this study.

Write a paper (2,000-2,500 words) in which you apply the concepts of epidemiology and nursing research to a communicable disease. Refer to "Communicable Disease Chain," "Chain of Infection," and the CDC website for assistance completing this assignment.

Communicable Disease Selection

Choose one communicable disease from the following list:

Tuberculosis

Epidemiology Paper Requirements

Address the following:

Describe the communicable disease (causes, symptoms, mode of transmission, complications, treatment) and the demographic of interest (mortality, morbidity, incidence, and prevalence). Is this a reportable disease? If so, provide details about reporting time, whom to report to, etc.

Describe the determinants of health and explain how those factors contribute to the development of this disease.

Discuss the epidemiologic triangle as it relates to the communicable disease you have selected. Include the host factors, agent factors (presence or absence), and environmental factors. (The textbook describes each element of the epidemiologic triangle). Are there any special considerations or notifications for the community, schools, or general population?

Explain the role of the community health nurse (case finding, reporting, data collecting, data analysis, and follow-up).

Identify at least one national agency or organization that addresses the communicable disease chosen and describe how the organization(s) contributes to resolving or reducing the impact of disease.

Discuss a global implication of the disease. How is this addressed in other countries or cultures? Is this disease endemic to a particular area? Provide an example.

A minimum of three peer-reviewed or professional references is required.

Prepare this assignment according to the guidelines found in the APA Style Guide, located in the Student Success Center. An abstract is not required.