Find the covariance between age and the number of visits

Reference no: EM1389727

Suppose that we are interested in the relationship between the age of the individuals who are members of our managed-care organization and the use of physician care, as measured by visits. Suppose also that after selecting 15 members at random we obtained the following paired observations:

Visits: 3 5 4 2 1 3 6 7 4 5 10 1 2 3 8
Age 28 45 50 19 16 27 54 63 32 42 68 19 23 30 61

Use these data to find the covariance between age and the number of visits.

Reference no: EM1389727

Questions Cloud

Variance of systolic blood pressure : A doctor believes that the variance of systolic blood pressure is 470. A random sample of 20 patients found a variance of 525. What is the smaller critical value that would be used in a hypothesis test at a .05 significance level?

Discuss job outsourcing by assessing its benefit : Discuss job outsourcing by assessing its benefit to U.S. firms. Many marketers now believe that teenagers in the developed countries are becoming "global consumers." That is, they all want and buy the same goods and services.

Genetic based multiple choice questions : Irregularly a person is discovered to have one blue eye and one brown eye. This is caused by the creation of a new mutation. In which cell did the mutation occur?

Explain the various privacy rights that businesses : Explain the various privacy rights that businesses on the Web are lawfully obligated to adhere to. Describe some of the gray areas in enforcing these laws on the Internet.

Find the covariance between age and the number of visits : Suppose also that after selecting 15 members at random we obtained the following paired observations: Use these data to find the covariance between age and the number of visits.

Determine whether file sharing is necessary to further : Determine whether file sharing is necessary to further advantage technology or if it should be stopped because it violates copyright law

Simple hypotheses of two different oganisms : What would be a simple hypotheses of two different oganisms (not a bee and Flower) that interact with one another. by using the scientific method and imagination how would an experiment test this hypothesis.

Increasing the hydrophilicity of ldpe : Phosphonylation, a chemical surface treatment, has been proposed as a means of increasing the hydrophilicity of LDPE, and therefore increase its lubricity and reduce vascular tissue damage.

Suppose that the fisher hypothesis holds for an economy : Suppose that the Fisher hypothesis holds for an economy that has an expected real interest rate of 10%. For an expected inflation rate of 5%, calculate the nominal interest rate and the after-tax expected real interest rate if the tax rate is 9%

User Account

All Pages