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Test of hypothesis in Excel data analysis add in

When we have two sample data driven from one or two population and want to see if the mean of those two population (or the mean of one population between two different time) has been changed or not, we use statistical method called test of hypothesis for mean difference, which also known as AB test in some applications. Here we use data analysis add ins in the excel to generate this method in simple way.

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Covariance and correlation in Excel data analysis add in

When we want to know if there is relationship between two or more variables, we need to calculate their covariance or correlation indexes. These to will show us how much two variables are related together. If these indexes have greater values (in correlation, near to 1), then showing us there is straight relation between variables. And if their values be huge negative number (in correlation, near to -1) then it showing the inverse relation between variables. However, if value of these indexes be near to 0, then it suggesting no relation between variables.

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Exponential Smoothing in Excel data analysis add in

Exponential smoothing, or Exponential moving average, is a method in time series analysis that helps us to analysis time based data and predicting of new period data. The approach of this method is getting average of all the data in time line with more attention on newest data periods. we can create a very fast report by using data analysis add in of Excel.