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Please show your work

Last one Please show your work-example-1

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Mean = (Sum of values)/(Number of values)


Mean\\ \\ =\frac { 55+62+61+54+68+72+59+61+70 }{ 9 } \\ \\ =\frac { 562 }{ 9 } \\ \\ =62.4\quad mph\quad (1\quad d.p)\\ \\

Range = Highest Value - Lowest Value


Range\\ \\ =72-54\\ \\ =18\\ \\
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