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\subsubsection{Statistical Treatment of Data} \\  T-distribution for dependent samples statistics is used to validate further the correctness and accuracy of the results derived from the Questionnaire method. By using the paired-sample design of t-distribution, the researchers can determine if the user has significantly improved their knowledge from the presentation. The formulas that will be used by the researchers are as follows:  \begin{equation*}{\[s_\bar{D} = \dfrac{s}{\sqrt{n}}\]}\end{equation*}  Table 6 is composed of the different ranges of Kappa coefficient value along with its interpretation according to \citet{landis1977measurement}.  \begin{table}   \caption{Ranges of kappa coefficient}  \begin{tabular}{ c c }  KAPPA & INTERPRETATION \\   < 0 & Poor Agreement \\   0.01 - 0.20 & Slight Agreement \\   0.21 - 0.40 & Fair Agreement \\   0.41 - 0.60 & Moderate Agreement \\   0.61 - 0.80 & Substantial Agreement \\   0.75 and up & Almost perfect Agreement \\   \end{tabular}   \end{table}