The coefficient of DevProb has a positive and statistically significant relationship with sales rank in audio-video players and DVDs, but is statistically insignificant for digital cameras.
In general this suggests that a decrease in the deviation of the probability of subjective comments leads to a decrease in sales rank, i.e., an increase in product sales. This means that
reviews that have a mixture of objective, and highly subjective sentences have a negative effect on product sales, compared to reviews that tend to include only subjective or only objective
information.