Specify "each" type of variable in "each" question ( such as nominal, ordinal, continuous, etc) and state the null and alternative hypothesis to depict the relationship between the variables in each question. Also, include symbols following the written hypothesis, such as Var1> Var2 the association between the number of hours in the operating room and the number of hours on a bypass pump? the relationship between the number of days in the ICU and gender?
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.
Specify "each" type of variable in "each" question ( such as nominal, ordinal, continuous, etc) and state the null and alternative hypothesis to depict the relationship between the variables in each question. Also, include symbols following the written hypothesis, such as Var1> Var2
- the association between the number of hours in the operating room and the number of hours on a bypass pump?
- the relationship between the number of days in the ICU and gender?
- the association between the number of hours in the operating room and the number of hours on a bypass pump?
Variable Types:
The number of hours in the operating room - It is a discrete variable. It is count data which will only take integer values.
The number of hours on a bypass pump - It is a discrete variable. It is count data which will only take integer values.
Continuous Variables can take on any value on a number line, whereas discrete variables can take on only integers.
Let Var1 represents the number of hours in the operating room
Var2 represents the number of hours on a bypass pump
Formulating the Hypothesis :
Null : H0 : Var1 = Var2 ( There is no association between the number of hours in the operating room and the number of hours on a bypass pump)
Alternative : Ha : Var1 ≠ Var2 ( There is a association between the number of hours in the operating room and the number of hours on a bypass pump)
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