Relatively minor repetitive impacts to the head such as those experienced by elite male soccer players when hit-ting a soccer ball with their heads may cause brain dam-age, according to the Journal of the American Medical Association. One indicator of mild brain injury is calledradial diffusivity. The radial diffusivity measurements oftwelve right-handed male soccer players were comparedto those of eleven competitive swimmers (who are notlikely to have repeated head impacts). Which type of plotwould not be appropriate for assessing the differencebetween the two groups?A) Stacked dotplots, one for each group, on the sameaxisB) Side-by-side boxplotsC) Stacked bar graphsD) A back-to-back stem-and-leaf plotE) A pair of histograms, one above the other, on the sameaxis. www.medpagetoday.com/Neurology
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.
ting a soccer ball with their heads may cause brain dam-
age, according to the Journal of the American Medical
radial diffusivity. The radial diffusivity measurements of
twelve right-handed male soccer players were compared
to those of eleven competitive swimmers (who are not
likely to have repeated head impacts). Which type of plot
would not be appropriate for assessing the difference
between the two groups?
A) Stacked dotplots, one for each group, on the same
axis
B) Side-by-side boxplots
C) Stacked bar graphs
D) A back-to-back stem-and-leaf plot
E) A pair of histograms, one above the other, on the same
axis. www.medpagetoday.com/Neurology
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