The following table was presented in a article summarizing a study to compare a new drug to a standard drug and to a placebo. characteristic new drug stand. drug placebo p age,yrs 45.2(4.8) 44.9(5.1) 42.8(4.3) 0.5746 % female 50% 55% 57% 0.1635 annual income,$000s 59.5%(14.3) 63.8(16.9) 58.2%(13.1) 0.4635 % w/ins 87% 65% 82% 0.0352 disease stage 0.0261 stage 1 35% 18% 33% stage 2 42% 37% 47% stage 3 23% 51% 20% Are there any statistiscally significant differences in the characteristics shown among the treatments? Justify your answer.
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.
The following table was presented in a article summarizing a study to compare a new drug to a standard drug and to a placebo.
characteristic new drug stand. drug placebo p
age,yrs 45.2(4.8) 44.9(5.1) 42.8(4.3) 0.5746
% female 50% 55% 57% 0.1635
annual income,$000s 59.5%(14.3) 63.8(16.9) 58.2%(13.1) 0.4635
% w/ins 87% 65% 82% 0.0352
disease stage 0.0261
stage 1 35% 18% 33%
stage 2 42% 37% 47%
stage 3 23% 51% 20%
Are there any statistiscally significant differences in the characteristics shown among the treatments? Justify your answer.
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