Which of the following are assumed to remain unchanged along a given short run aggregate supply curve?

The average month end closing stock price for company a over the past year is $34.57 with a standard deviation of $4.65. the average month end closing stock price for company b over the same period is $26.15 with a standard deviation of $7.45. based on this data, we can conclude that the stock price for company a is more consistent when compared to the stock price for company b.