Shapiro-Wilk normality test
The shapiro-wilk test tends to be quite powerful. So with large samples, the test can be significant even when the scores are only slightly different from a normal distribution.
→ Use histograms, Q-Q plots, and values of skewness/ kurtosis to double-check.
The Shapiro-Wilk test found that the hygiene scores on Day 1 were significantly non-normal at the 5% level of significance (W=0.99591, p<0.05).