When it is best to use the coefficient of variation?

When it is best to use the coefficient of variation?

The coefficient of variation represents the ratio of the standard deviation to the mean, and it is a useful statistic for comparing the degree of variation from one data series to another, even if the means are drastically different from one another.

What is a negative coefficient?

A negative coefficient suggests that as the independent variable increases, the dependent variable tends to decrease. The coefficient value signifies how much the mean of the dependent variable changes given a one-unit shift in the independent variable while holding other variables in the model constant.

What is the z score of 95 percent?

1.96

How do you find Z value in Excel?

Excel Z ScoreExcel Z Score (Table of Contents)Z = (x-µ) / σMean (or Average) calculation:Step 1 – Go to the Formulas tab. Step 2 – Now click on Statistical functions category from the drop-down list. Step 3 – It will open a Function Arguments dialog box. Standard Deviation calculation:Step 1 – Go to the Formulas tab.