Well since the formula for the arithmetic mean is [tex]m= \frac{ x_{1} + x_{2} +...+ x_{n} }{n} [/tex] [tex] x_{1} [/tex] thourgh [tex] x_{n} [/tex] will be each of the numbers (2, 63, 88, 10, 72, 99, 38) and n would be the number of numbers being added. You have 7 numbers being added making n 7 so your equation would be [tex]m= \frac{2+63+88+10+72+99+38}{7} [/tex]
