Method B Apply Data Analysis and output the analysis As variable X increases, variable Z decreases and as variable X decreases, variable Z increases. On the other hand, a correlation coefficient of -1 indicates a perfect negative correlation. Note: A correlation coefficient of +1 indicates a perfect positive correlation, which means that as variable X increases, variable Y increases and while variable X decreases, variable Y decreases. In Excel, we also can use the CORREL function to find the correlation coefficient between two variables. ![]() We usually use correlation coefficient (a value between -1 and 1) to display how strongly two variables are related to each other. How to calculate the correlation coefficient between two variables in Excel?
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