Answer:
72
Step-by-step explanation:
[tex] \\ \tt{} \mu = \frac{sum \: of \: the \: data}{number \: of \: data} [/tex]
[tex]\\ \tt{} \mu = \frac{83 + 68 + 62 + 80 + 66 + 94 + 67 + 72 + 56 }{9} [/tex]
[tex] \\ \tt{} \mu = \frac{648}{9} [/tex]
[tex]\\ \boxed{ \huge \boxed{ \tt{} \mu = 72}} \\ \\ \\ \\ \\ [/tex]
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