Use the study description below to answer the following questions. A research group is interested in the relationship between alcohol consumption and heart disease in American men over the age of 40 years old. The researchers randomly selected 1913 medical records of men who suffer from heart disease. The researchers recorded if the participant did not drink, drank moderately, or drank heavily. They found that men who had heart disease tended to drink heavily. a. Identify the population for the study. b. Identify the sample for the study. c. Was this an observational study or a controlled experiment? Explain how you know. d. Assuming the rest of the study was well-designed, use your answers to discuss whether it would be reasonable to conclude that drinking heavily will cause heart attacks.
Correlation
Correlation defines a relationship between two independent variables. It tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.
Linear Correlation
A correlation is used to determine the relationships between numerical and categorical variables. In other words, it is an indicator of how things are connected to one another. The correlation analysis is the study of how variables are related.
Regression Analysis
Regression analysis is a statistical method in which it estimates the relationship between a dependent variable and one or more independent variable. In simple terms dependent variable is called as outcome variable and independent variable is called as predictors. Regression analysis is one of the methods to find the trends in data. The independent variable used in Regression analysis is named Predictor variable. It offers data of an associated dependent variable regarding a particular outcome.
Use the study description below to answer the following questions.
A research group is interested in the relationship between alcohol consumption and heart disease in American men over the age of 40 years old. The researchers randomly selected 1913 medical records of men who suffer from heart disease. The researchers recorded if the participant did not drink, drank moderately, or drank heavily. They found that men who had heart disease tended to drink heavily.
a. Identify the population for the study.
b. Identify the sample for the study.
c. Was this an observational study or a controlled experiment? Explain how you know.
d. Assuming the rest of the study was well-designed, use your answers to discuss whether it would be reasonable to conclude that drinking heavily will cause heart attacks.
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