Figure 4: Reverse cumulative average analysis.

Comparison of the reverse cumulative average 〈y|t〉 of the event data to the reverse cumulative average of the simulation data. Each plot is identified by the value of F used in the simulations. In all graphs, the red-circle line is the 〈y|t〉 of the y annihilation positions of the event data. The green-triangle line is the reverse cumulative average of the x annihilation positions of the event data, and is included as a comparison. The black solid line is the 〈y|t〉 of approximately 900,000 simulated antihydrogen atoms. The black dashed line mirrors the black-solid line around 〈y|t〉=0, and is equivalent to a simulation study of antigravity, i.e., negative F. The grey bands demark the 90% confidence region (95% when interpreted as a one-sided confidence test) for 434 annihilations around the gravity and antigravity 〈y|t〉. The procedures for computing the 〈y|t〉 and the error bands are described in the Methods. The error bars on the event data give the standard error of the mean for 〈y|t〉. The calculated lines do not include the effects of systematic errors.