They gauge employees on low or non-performers, average performers, and high performers. Using this performance appraisal, they reward employees in terms of salary, promotions, etc. All the organizations work on performance appraisal for a specific period frame. read more is the graph commonly used to gauge the performance appraisal of company employees. It gets its name from the shape of the graph which resembles to a bell.

The bell curve Bell Curve Bell Curve graph portrays a normal distribution which is a type of continuous probability. We can plot the standard deviation in the Excel graph called the “ bell-shaped curve.” Typically, the standard deviation is the variation on either side of the average or means value of the data series values. For example, in the stock market, how the stock price is volatile. The standard deviation is one of the important statistical tools which shows how the data is spread out. The standard deviation graph is also known as the bell curve graph in Excel. The other is negative to the mean, shown on the left-hand side of the graph. There are two deviations represented in the standard deviation graph, one positive to the mean, shown on the right-hand side of the graph. We know that standard deviation is a calculation of how the values are changing with comparison or the respect to the mean or the average value.

How to plot a graph in excel