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Bulletin of the National Research Centre
Fig. 3 | Bulletin of the National Research Centre

Fig. 3

From: Evaluating the impact of COVID-19 pandemic lockdown on education in Nigeria: Insights from teachers and students on virtual/online learning

Fig. 3

Box plot comparing marks of four courses chosen randomly from 2019 and 2020 academic sessions (no. of students per course = 206). Awarded marks in 2019 (orange colour) represent assessment done with the traditional face-to-face method (offline), while awarded marks in 2020 (blue colour) represent assessment during the COVID-19 lockdown (online). In each box, the horizontal border represents the first and third quartiles of awarded marks, upper and lower whiskers represent the highest and lowest awarded marks for each cohort, and interquartile range (IQR) rule was used to identify outliers. The awarded marks for all courses in 2020 were found to be significantly different (p < 0.05) from awarded marks in 2019 using an unpaired two-tailed unequal variance t-test

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