Raw Data

Nike
Nike
Nike
Nike
Nike
Nike
Adidas
Nike
Nike
Nike
Nike
UA
Nike
Nike
Nike
Nike
Nike
UA
UA
Nike
Nike
Nike
Nike
Nike
Adidas
UA
Nike
Nike
Nike
Nike
Nike
Nike
Adidas

Expected Data vs Observed Data Counts

Expected*:                               Observed:

Nike = 11/33                                  =26/33

Adidas = 11/33                               =3/33

Under Armour = 11/33                    =4/33

*All expected cells are greater than 5, meaning the assumption checks out allowing us to use the chi-squared goodness of fit test.