only marginally significantp = 0.06
A chi-square test revealed that the four groups exhibited no significant differences in terms of sex (χ 2 = 1.95, p = 0.58) or grade taught (χ 2 = 1.88, p = 0.60) and only marginally significant differences in terms of whether they were head teachers (χ 2 = 7.58, p = 0.06).