Is correlation coefficient significantly different from zero

Assignment Help Microeconomics
Reference no: EM131010835

Researchers measured the number of neurons in the CA1 region of the hippocampus in the brains of eight persons who had died of causes unrelated to brain function. They found that these data were negatively correlated with age. The sample value of r was - 0.63.7.

(a) Is this correlation coefficient significantly different from zero? Conduct a test using a = 0.10.

(b) Suppose in part (a) you found that the correlation does significantly differ from zero. Does this provide evidence that aging is a cause for CA1 neuron loss? If not, what could be said? Briefly explain.

Reference no: EM131010835

Questions Cloud

Explain the mcd spectra in zno in much details : Magneto Optical properties (studies) of non magnetic ZnO and doped ZnO - explain and concentrate on the result in
Issue a credit memorandum to maria''s life management : On a worksheet, the income statement debit column totals $10,200 and the credit column totals $10,000. Which of the following statements is correct?
What proportion of the variation in cob weights : The dosage levels were 1.5, 3.0, and 6.0 gm alcohol per kg body weight. The body temperature of each mouse was measured immediately before the alcohol was Interpret the value of se in the context of this setting.
Elastic behaviour of materials : Write a sentence to indicate the subjects dealt with in the paper and state the objectives of the investigation - Include a diagram of the equipment and Describe the materials needed for the experiment
Is correlation coefficient significantly different from zero : Researchers measured the number of neurons in the CA1 region of the hippocampus in the brains of eight persons who had died of causes unrelated to brain function. They found that these data were negatively correlated with age. The sample value of ..
Develop a training plan for the client : Your task is to develop a training plan for the client. In your plan, consider the following: Needs assessment,  Environmental analysis, Organizational analysis and Demographical analysis and Operational analysis
Test hypothesis population correlation coefficient is zero : The concentrations of urea and of uric acid were measured for each specimen, and the correlation between these two concentrations was found to be r = 0.2291. Test the hypothesis that the population correlation coefficient is zero against the alter..
What is the drug-free workplace act : What is the Drug-Free Workplace Act of 1988 and why is it important for human resource management in the hiring process and in random drug testing during employment
Determine slope of the line tangent to circle at given point : Determine a formula for dy/dx using implicit differentiation, the slope of the line tangent to the circle at the point (1, √3) and any points on the graph where the line(s) tangent to the curve is horizontal.

Reviews

Write a Review

Microeconomics Questions & Answers

  The free rider problem

Question: Explain why the free rider problem makes it difficult for perfectly competitive markets to provide the Pareto efficient level of a public good.

  Failure of the super committee is good thing for economy

Some commentators have argued that the failure of the “Super committee” is good thing for the economy?  Do you agree?

  Case study analysis about optimum resource allocation

Case study analysis about optimum resource allocation: -  Why might you suspect (even without evidence) that the economy might not be able to produce all the schools and clinics the Ministers want? What constraints are there on an economy's productio..

  Fixed cost and vairiable cost

Questions:  :   Which of the following are likely to be fixed costs and which variable costs for a chocolate factory over the course of a month?  Explain your choice.

  Problem - total cost, average cost, marginal cost

Problem - Total Cost, Average Cost, Marginal Cost: -  Complete the following table of costs for a firm.  (Note: enter the figures in the  MC   column  between  outputs of  0 and 1, 1 and 2, 2 and 3, etc.)

  Oligopoly and demand curve problem

Problem based on Oligopoly and demand curve,  Draw and explain the demand curve facing each firm, and given this demand curve, does this mean that firms in the jeans industry do or do not compete against one another?

  Impact of external costs on resource allocation

Explain the impact of external costs and external benefits on resource allocation;  Why are public goods not produced in sufficient quantities by private markets?  Which of the following are examples of public goods (or services)? Delete the incorrec..

  Shifts in demand and movements along the demand curve

Describe the differences between shifts in demand and movements along the demand curve. What are the main factors which can shift the demand curve? Explain why they cause the demand curve to shift. Use examples and draw graphs to support your discuss..

  Article review question

Article Review Question: Read the following excerpts from the article "Fruit, veg costs surge' by Todd, Dagwell, published in the Herald on January 25th 2011 and answer questions below:

  Long-term growth, international trade & globalization

Long-term Growth, International Trade & Globalization:- This question deals with concepts such as long-term growth, international trade and globalization. Questions related to trade deficit, trade surplus, gains from trade, an international trade sce..

  European monetary union (emu) in crisis

"Does the economic bailout of Spain and Greece spell the beginning of the end for the European Monetary Union (EMU)?"

  Development game “settlers of catan”

Read the rules of the game, the overview and the almanac for the Development Game "Settlers of Catan"

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd