Figure 2.

Count frequency of Campylobacter cases in FoodNet (bars) with normal negative binomial curve overlay (number of observations= 92736, mean = 0.434, theta = 0.213). Y axis is shown using a square root scale.

Count frequency of Campylobacter cases in FoodNet (bars) with normal negative binomial curve overlay (number of observations= 92736, mean = 0.434, theta = 0.213). Y axis is shown using a square root scale.