A Chi-square test was used to test the correlation between pea size and the amount of toothpaste placed on a toothbrush. The associated significance level is 0.000 (2-sided), which is significant. It was noted that 52.5% of the population thought the toothbrush
with the smallest amount on it was the amount that should be placed on the toothbrush; and 44.6% of them actually knew what a pea size was. 31.7% thought that the small-medium amount of toothpaste on the toothbrush was the right amount that should be placed, but only 22.3% knew what a pea size was. The Pearson correlation was 0.160 (sig. 0.001 2-tailed).