Answer with explanation:
1.Mean of a Data set
[tex]=\frac{\text{Sum of all the observation}}{\text{total number of observation}}[/tex]
[tex]=\frac{10+9+11+8+10+12+2+7+8+0+12+10+8+11+3+12+6+7+4+3}{20}\\\\=\frac{153}{20}\\\\=7.65[/tex]
2. Range = Maximum value in two conferences - Minimum value in two conference
= 12 - 0
=12
The mean number of wins for teams from the two conferences is 7.65.
The range in wins is 12.