################Section 2#########################
# Running a mixed model in R
# Four Step Process to build a mixed model in R

# 1) A priori model bulding and data exploration####
# i)  Map out the model based on a priori knowledge
# We know that we want to build a model that evaluates the relationship 
# bewteen trophic position and length while accounting for lake and species variation
# Trophic Position ~ Length + Species + Lake

# ii)Housekeeping and data exploration
# Ensure that the structure of your data is correct
str(data)