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Figure 3 | BMC Infectious Diseases

Figure 3

From: What is the incubation period for listeriosis?

Figure 3

Distribution of incubation period for each clinical form of 37 invasive cases of listeriosis (box-plot). Line in the middle of boxes represents median of data. Boxes extend from the 25th percentile (X[25]) to 75th percentile (X[75]), representing interquartile range (IQR). Lines emerging from boxes extend to upper and lower adjacent values. The upper adjacent value is defined as the largest data point ≤X[75] + 1.5 x IQR. The lower adjacent value is defined as the smallest data point ≥X[25] – 1.5 x IQR. Dots are outliers (every point more than 1.5 x IQR from the end of a box).

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