The Sequence Shows a Companyʹs Daily Sales, in Thousands of Dollars

Essay

The sequence shows a companyʹs daily sales, in thousands of dollars, for the business days during the month of
September. Test the claim that the sales are random. $$\begin{array} { r r r l l c l l l l } 10 & 10 & 15 & 12.5 & 20 & 12.5 & 10 & 10 & 12.5 & 20 \\8 & 10 & 10 & 20 & 15 & 9 & 12.5 & 12.5 & 20 & 17.5\end{array}$$