mean:
add all the values and divide by the number of values.
[tex] \frac{72 + 31 + 31 + 80 + 97 + 65}{6} [/tex]
[tex] = 62.7[/tex]
median:
arrange either ascending order and find the middle values and then divide by two.
[tex]31 \: 31 \: 65 \: 72 \: 80 \: 97[/tex]
[tex] \frac{65 + 72}{2} [/tex]
[tex] = 68.5[/tex]
mode:
most frequently occurred value.
[tex] = 31[/tex]
range:
subtract the highest value from the lowest value.
[tex]97 - 31[/tex]
[tex] = 66[/tex]
