A researcher collects a nationally based set of data about cholesterol levels and age at first circulatory incident (myocardial infarction or cerebrovascular accident)
The researcher performs a linear regression analysis in order to do which of the following? (Select all that apply.)
a. Estimate the age at which circulatory incidents are likely to occur, given the cholesterol level.
b. Determine how well the data fit the theoretical framework.
c. Calculate the strength of the relationship between cholesterol levels and circulatory incidents.
d. Determine whether there is a linear relationship between cholesterol levels and circulatory incidents.
e. Derive the formula for the line of best fit.
f. Obtain information from which to construct a better scatter plot.
ANS: A, C, D, E
Simple linear regression provides a means to estimate the value of a dependent variable based on the value of an independent variable. Through regression, the strength of the relationship between two variables can be determined. Simple linear regression is an effort to explain the dynamics within the scatter plot by developing a formula for a straight line that best fits the data. This has nothing to do with a theoretical framework. A scatter plot precedes development of a regression formula.
You might also like to view...
The nurse is aware that a thermography finding of cool spots in a certain area indicates:
1. increased blood flow. 2. decreased infection. 3. increased infection. 4. decreased blood flow.
A patient presents with chest trauma from an MVA
Upon assessment, the nurse documents that the patient is complaining of dyspnea, shortness of breath, tachypnea, and tracheal deviation to the right. In addition, the client's tongue is blue-gray. Based on the following data, what the nurse would expect to find? a. PaO2 of 88 and PCO2 of 55 b. Absent breath sounds in all right lung fields c. Absent breath sounds in all left lung fields d. Diminished breath sounds in all fields
Determine how many tablets will be needed to give the following dose: Tablets are labeled 0.2 mg. You must give 0.4 mg
What will be an ideal response?
An emergency department nurse is performing an assessment of a client who has sustained circumferential burns of both legs. What should the nurse assess first?
A. Heart rate B. Radial pulse rate C. Peripheral pulses D. Blood pressure (BP)