Table 2.

Test and CI for two proportions

Sample	Returns	Migrated	Sample proportions
Slice	9680	173578	0.055767
Control	8528	178564	0.047759
Difference = prop (Slice)−prop (Control)
Estimate for difference: 0.00800865
95% CI for difference: (0.00654450, 0.00947280)
Test for difference = 0 (vs. not = 0): Z = 10.72; P-Value = 0.000
Fisher's exact test: P-Value = 0.000