Table 5

Sensitivity, specificity, and positive and negative predictive values of naïve Bayes classifier on test queries (25% of all queries fielded between November 2016 and June 2017)

CategorySensitivitySpecificityPositive predictive valueNegative predictive value
Question0.910.680.930.61
Message Switch0.590.980.640.97
Compliment0.720.990.710.99
PMTCT0.630.980.520.98
Opt Out0.270.990.190.99
Complaint0.190.990.171.00
Language Switch0.620.990.331.00
Spam0.001.000.001.00
Unable to Assist0.001.000.001.00