Where am I going wrong!!

I have attached a screenshot below of the question, my submitted answer, and the trainer comments. Any help or advice VERY MUCH appreciated!!

b. Outline two different measures of variance, providing an example using financial data, e.g. sales figures, competitor prices etc. Not Satisfactory please look to describe two i, Standard Deviation different measures of variance, for example, Standard Deviation as a measure of sales, it computes how much sales deviated or may deviate sales figures one month might differ from the average sales. significantly from the previous due to a range of different reasons. Statistical Analysis Statistical Analysis helps in measuring the variances of actual performance from projected sales data. Due to this, it becomes easier to monitor expenses and eliminate unnecessary ones. Statistical analysis further helps in forecasting sales, expenses, and profits based on past and present trends