The following table was presented in an article summarizing a study to compare a new drug to a standard drug and to a placebo. Characteristic* New Drug Standard Drug Placebo p Age, years 45.2 (4.8) 44.9 (5.1) 42.8 (4.3) 0.5746 % Female 51% 55% 57% 0.1635 Annual Income, $000s 59.5 (14.3) 63.8 (16.9) 58.2 (13.6) 0.4635 % with Insurance 87% 65% 82% 0.0352 Disease Stage 0.0261 Stage I 35% 18% 33% Stage II 42% 37% 47% Stage III 23% 51% 20% *Table entries and Mean (Sd. or % Are there any statistically 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.
QUESTION 41
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The following table was presented in an article summarizing a study to compare a new drug to a standard drug and to a placebo.
Characteristic*
New Drug
Standard Drug
Placebo
p
Age, years
45.2 (4.8)
44.9 (5.1)
42.8 (4.3)
0.5746
% Female
51%
55%
57%
0.1635
Annual Income, $000s
59.5 (14.3)
63.8 (16.9)
58.2 (13.6)
0.4635
% with Insurance
87%
65%
82%
0.0352
Disease Stage
0.0261
Stage I
35%
18%
33%
Stage II
42%
37%
47%
Stage III
23%
51%
20%
*Table entries and Mean (Sd. or %
Are there any statistically significant differences in the characteristics shown among the treatments? Justify your answer
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