The Annual Sales for a Manufacturing Company for Each of the Past

Short Answer

The annual sales for a manufacturing company for each of the past five years were $\$ 600,000, \$ 721,000, \$ 138,000, \$ 621,000$ , $\$ 865,000$ . Which of the following conclusions can be obtained from these figures by purely descriptive methods, and which require generalizations?
-With the information provided, solve the following: Sales were low in the third year because of the recession.