Brainarium

In the case of MLR, controlling variables are used to control for sample bias. - CORRECT ANSWER-True In the case of a multiple regression model with 10 predictors, the error term variance estimator follows a chi-squared distribution with n - 10 degrees of freedom. - CORRECT ANSWER-False The estimated coefficients obtained by using the method of least squares are unbiased estimators of the true coefficients. - CORRECT ANSWER-True Before making statistical inference on regression coefficien...

True/False: Logistic regression answers "Yes/No" type binary Questions. True Ex: Yes/No True/False Weak/Strong etc., In Logistic regression modeling, we model the __________ probability of yes. What are the assumptions of a Linear Regression? The assumptions are that the error terms are normally distributed with mean zero, and constant variance, and that they are independent. The normality assumption also implies that the response variable is normally distributed Why can't we...

We cannot use the training error rate as an estimate of the true error classification error rate because it is biased upward. - CORRECT ANSWER-False - biased downward Random sampling is computationally more expensive than the K-fold cross validation, with no clear advantage in terms of the accuracy of the estimation classification error rate. - CORRECT ANSWER-True Leave on out cross validation is preferred - CORRECT ANSWER-False - K fold is preferred. The larger K is, the larger the numbe...

The linearity assumption can be evaluated by plotting the logit of the success rate versus the predicting variables. If there's a curvature or some non-linear pattern, it may be an indication that the lack of fit may be due to the non-linearity with respect to some of the predicting variables Logistic Regression Coefficient - CORRECT ANSWER-We interpret the regression coefficient beta as the log of the odds ratio for an increase of one unit in the predicting variable We do not interpre...

What is the formula for the logit function? - CORRECT ANSWER-ln(p/1-p) The interpretation of the regression coefficients in logistic regression is the same as for standard linear regression assuming normality. - CORRECT ANSWER-False The estimation of the regression coefficients is based on what? - CORRECT ANSWERmaximum likelihood estimation We can derive exact (close form expression) estimates for the regression coefficients. - CORRECT ANSWER-False In logistic regression, the estimations o...

A physical or mental condition that limits an individual's ability to perform functions considered normal. - CORRECT ANSWER-Disability A combined mortality- morbidity index that reflects years of life free of disability and symptoms of illness. - CORRECT ANSWER-Quality adjusted life years Major categories of mental health measures - CORRECT ANSWER-Mental Conditions; Behaviors; perceptions; satisfaction; Services received Categories of physical health - CORRECT ANSWER-•Life expectan...

Weighing the risk of defamation - CORRECT ANSWER-Giver of reference must weigh risk of defamation lawsuit by ex employee against the risk of a bad hire lawsuit by requestor or victim Weighing the risk of negligent hire - CORRECT ANSWER-The requestor of a reference must weigh the risk of negligent hire by injuries person against the risk of discrimination lawsuit by potential employee A Manager's Role in Finding Candidates - CORRECT ANSWER--keep position descriptions up to date -groom ...

Opportunity cost is a measure of foregone opportunities and value based on the alternative not chosen. The opportunity cost of investing in a new lithotripter (a machine that pulverizes kidney stones with sound waves) is defined by the next best use of the money invested in the equipment. What percentage of Americans considered the complete repeal of the Patient Protection And Affordable Care Act of 2010 a good thing? 40 percent By 2020, what was the forecasted percentage amount of healt...

What represents a challenge that healthcare organizations face in their ability to exchange information with other organizations? - CORRECT ANSWER-Lack of public trust for privacy ____________ planning is an important piece of the overall EHR maintenance and will include a formal disaster recovery plan process and downtime planning - CORRECT ANSWER-Contingency (T/F) Another name for a clinical information system (CIS) is the electronic health records (EHR). - CORRECT ANSWER-False (T/F) O...

Health Care System All persons, institutions, and processes supporting diagnosis and treatment of health problems. Variation Among Nations' Health Care Systems • Definitions of health problems • Diagnosis & treatment models • Social position, training, and authority of healers Chinese medicine healthcare variations human body must maintain a sense of homeostasis in order to maintain at state of health - yin and yang western medicine healthcare variations perceives the human b...

How much $$ is spent on HC in US? Per capita and % of GDP? - CORRECT ANSWER-$3.49trillion, 17.9% GDP and $10,739 per capita. Financing health care in U.S. - CORRECT ANSWER-.Workarounds •Redundancies •Contradictions Percentage spent in hospitals? - CORRECT ANSWER-33%- largest share of NHE Percentage spent on Doctors? - CORRECT ANSWER-26%- second highest share of NHE Percentage spent on drugs? - CORRECT ANSWER-9.5%-10.5%- third highest share of NHE Chronic disease? - CORRECT ANSWER...

According to Grossman (1972), how is the demand for medical care determined? It is derived from the demand for health Suppose your assignment is to use the standard time trade-off approach to measure quality of life. You are given the following information: An individual is faced with living the remaining 10 years of their life suffering from severe osteoporosis. The individual reveals that they would be willing to give up four of those years to live the remaining six in perfect health. Wh...

Healthcare informatics - CORRECT ANSWER-the field of information science concerned with the management of all aspects of health data and information through the application of computers and computer technologies.The field of information science concerned with the management of all aspects of health data and information through the application of computers and computer technologies information science - CORRECT ANSWER-The study of the nature and principles of information. Applied healthca...

What is the problem of scarcity? - CORRECT ANSWER-Demand for a good or service is greater than the availability What does it mean to say people are assumed to make choices rationally? - CORRECT ANSWER-focuses on individuals' efforts to best realize their goals, given their resources. What does it mean to says resources are scarce? - CORRECT ANSWER-Anything useful in consumption or production that has alternative uses. What is opportunity cost? - CORRECT ANSWER-Potential loss from a mis...

What are the different variations of healthcare systems? Health Care Systems •All persons, institutions, and processes supporting diagnosis, treatment or mitigation of health problems •For legitimized patients by appropriate providers •Definitions of health problems (e.g., obesity) •Diagnosis & treatment models •Social position, training, and authority of healers What are the determinants of health? •Genetic inheritance – also epigenetics (gene-environmental interactions) ...

How do individuals spending their own money behave differently than those spending someone else's money? - CORRECT ANSWER-Individuals spending their own money look for the best value given the price. Of the four categories of the Medicaid-eligible population, which of these could benefit by opening up the health exchanges to some degree of privatization? - CORRECT ANSWER-Adults A collectively financed medical care system that provides universal coverage to a basic benefits package for ...

Economics is best defined as the study of how to run a business most profitably. True or False. - CORRECT ANSWER-False Exhaust from a factory that increases health risks for people living near the factory is an example of an externality. True or False. - CORRECT ANSWER-True In 2008 and 2009, the U.S. economy experienced a deep economic downturn. If there is a short-run trade-off between inflation and unemployment, to combat the high unemployment, President Obama should have pursued an infl...

Which of the following statements is true concerning the trend in community hospital care between inpatient & outpatient services since the mid-1980s? - CORRECT ANSWER-Outpatient services have been growing, while inpatient services have been declining. On average, biopharmaceutical companies spend approximately what percentage of their sales revenue on research & development? - CORRECT ANSWER-5-10 percent. In 2019, Medicare covered approximately how many Americans? - CORRECT ANSWER-60 mil...

Technical security under HIPAA involves issues such as whether sensitive data need to be protected. __________ is a method of scrambling data so that they cannot be read without first being decoded. An AIDS registry, for example, might want to use this specific method to protect patient identifiable information since AIDS data are considered extremely sensitive. - CORRECT ANSWER-Encryption Which of the following is not considered a Case-Finding method? - CORRECT ANSWER-Medication Lists (T...

A physician's ability to induce demand is greatly enhanced when: - CORRECT ANSWER-patients have difficulty gathering and processing information. According to Grossman (1972), how is the demand for medical care determined? - CORRECT ANSWER-It is derived from the demand for health. The intangible costs associated with reduced quality of life include: - CORRECT ANSWER-pain and suffering. The primary tasks required to conduct a successful cost effectiveness study are all of the following e...