# Qualitative/quantitative statistics

● All data and variables are correctly described as qualitative or quantitative (SLO 1) ● Where applicable, suspected explanatory and response variables are appropriately described (SLO 1) ● Appropriate graphs (aka charts) of data for relevant variables are included (SLO 1, 2) ○ For each relevant variable (or pair of variables) there is at least one graph. ○ Graph types are appropriate to the data/variable classifications. ■ Single variable data data can be appropriately displayed in a bar graph, pie chart, histogram, as well as other types of graphs. ■ Time-series quantitative data can be appropriately displayed in a line graph as well as other types of graphs. ■ Paired variable data can be appropriately displayed in a scatter plot (paired quantitative variables), side-by-side or stacked bar graph (paired qualitative variables), as well as other types of graphs ○ Graphs are constructed and displayed appropriately. ■ Each graph displays the respective data correctly. ■ Each graph is sufficiently and accurately labeled. ■ Each graph is displayed at an appropriate location in the submission. ■ Each graph is adequately described, explained, and/or referenced in the submission’s narrative. ● Appropriate calculated/identified statistics are included (SLO 1, 3) ○ For each relevant variable, at least one calculated/identified statistic is included. ○ Calculated/identified statistics are appropriate to the data/variable classification. ■ Relative frequencies (equivalently, proportions or percents) are appropriate for qualitative data. ■ The mean can be an appropriate measure of center for interval and ratio level data. ■ The median can be an appropriate measure of center for ordinal, interval, and ratio level data. ■ The mode can be an appropriate measure of center for all data including grouped data. ■ The range, standard deviation, inter-quartile range, and percentiles are appropriate for interval and ratio level data. ○ Statistics are calculated/identified and referenced appropriately. ■ Each statistic is correctly calculated/identified using a widely accepted formula/procedure. ■ Each statistic is appropriately described, explained, and/or referenced in the submission’s narrative. 