Identify the most likely type of relationship between the two variables for each scenario. Assume the independent variable is mentioned first. Justify your answers. a) Grass growth is positively correlated with amount of rainfall. b) Arm length is positively correlated with leg length. c) Sandwich sales are negatively correlated with dog bite incidents. d) Interest in televised sport is positively correlated with fitness level. e) Incidence of diabetes is negatively correlated with healthy eating habits. f) Heart disease is positively correlated with lung cancer.
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.
Identify the most likely type of relationship
between the two variables for each scenario.
Assume the independent variable is
mentioned first. Justify your answers.
a) Grass growth is
amount of rainfall.
b) Arm length is positively correlated with
leg length.
c) Sandwich sales are
with dog bite incidents.
d) Interest in televised sport is positively
correlated with fitness level.
e) Incidence of diabetes is negatively
correlated with healthy eating habits.
f) Heart disease is positively correlated with
lung cancer.
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