aliimu care, dietary, er resources that are used each day Breaking the charges i

Question

aliimu care, dietary, er resources that are used each day Breaking the charges into the fixed and variable el UI 7.3 Instructions: Answer the following questions on a separate piece of paper. 1. If the correlation between patient lung volume level and BMI is 0.6, which of the followin Check Your Understanding 1 A Patients with low BMI have large lung volume 8. Patients with high BMI have large lung volume C. High BMI causes large lung volume D. Large lung volume causes high BMI 2. Which statistic measures the strength of the linear relationship between two variables? A Slope of the linear regression line B.t-test C. Correlation D. Intercept of the linear regression line 3. if the coefficient of determin + 300 x LOS 3. Ifthe coefficient of determination for this SLR model: Cost 1,500+300 x LOS is 0.8, then which of the statements is correct? A. 80 percent of the variance in length of stay is explained by cost B. 20 percent of the variance in cost is explained by length of stay C. 80 percent of the variance in cost is explained by length of stay D. 20 percent of the variance in length of stay is explained by cost 4, Using the model in questions 3: Cost = 1,500 + 300 x LOS, wha t is the interpretation of the slope of the line? A. The typical cost of care is $1,500 For every one day increase in length of stay, the cost will decrease by $300 C. For every one day increase in length of stay, the cost will increase by $300 D. The cost of care and length of stay are not related 5. Using the model in question 3: Cost = 1,500 + 300 × LOS, what is the interpretation of the intercept of the line? A. For every one day increase in length of stay, the cost will increase by $1,500 B. The fixed cost of admitting a patient is $1,500 C. For every one day increase in length of stay, the cost will decrease by $1,500 D. The fixed cost of admitting a patient is $300

Explanation / Answer

1) As the correlation coefficient between the 2 variables is positive, therefore as the value of one variable increases, the value of the other also increases and as it decreases for one variable, the value of the other also decreases.

Note that correlation does not given a causal relationship. Therefore c and d are false statements here.

Therefore B is the correct answer here.

2) Correlation is the test statistic that is used to measure the strength and sign of the mutual relationship between 2 variables. Therefore C is the correct answer here. -1 means perfect negative correlation and +1 means perfect positive correlation.

3) The coefficient of determination is equal to the proportion of variation in the dependent variablethat is cost in this case that is explained by the independent variable that is LOS here.

Therefore C is the correct answer here.

4) Here we are given a slope value of 300, this means that for a unit increase in the length of stay, there would be an increase of 300 times $1 that is $300 in the cost.

Therefore C is the correct answer here.

5) The intercept of the line means for a 0 length of stay, the cost is equal to that intercept which is 1500 here. ( this is like a fixed cost of admitting here )

Therefore B is the correct answer here

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