If overdispersion occur as a result of excessive
zero counts “i.e, zero inflation”, Zero Inflated
Poisson/Negative Binomial distributions are preferred
over the standard Negative Binomial distribution as they
have a parameter that handles excessive zeros. Without
doubting their outstanding performance in modeling
overdispersed and zero inflated datasets, there are
concerns as to whether zero inflated distributions should
always substitute standard distributions in these types of
datasets. For this reason, this paper intended to use
different real datasets to show that zero inflated models
are not always necessary even if the data is characterized
by overdispersion and zero inflation. This was achieved
through comparing Negative Binomial distribution with
Zero Inflated Poisson/Negative Binomial distributions in
datasets that went through the test of overdispersion and
zero inflation. With respect to goodness of fit of these
distributions, zero inflated distributions scored higher
AIC scores in all datasets when compared to Negative
Binomial distribution. Negative Binomial was marked as
the outstanding distribution in all datasets suggesting
that zero inflated models are not always necessary in
datasets caharacterized by overdispersion and zero
inflation.