For the following scores, ху 4 2 9 1 9.
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.
a. Draw a
Is this a positive or
Explain what a
b. Compute the pearson correlation.
a).
The scatter plot can be obtained using EXCEL software.
- Enter the variable x in column A and y in column B.
- Select the range of two variables with labels.
- Go to Insert > Charts > Scatterplot.
- Click OK.
The result obtained using EXCEL is given below.
Correlation:
Correlation a measure that indicates the “go-togetherness” of two data sets. It can be denoted as r. The value of the correlation coefficient lies between –1 and +1. The positive 1 indicates that the two data sets are perfect and both are in the same direction. The negative 1 indicates that the two data sets are perfect and both are in the opposite direction. It will be zero when there is no relationship between the two data sets.
If the data in the scatterplot shows an upward direction, then it is a positive correlation. If the data in the scatterplot shows a downward direction, then it is a negative correlation.
Here, the data has a positive correlation.
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