“..this might set clearer expectations for students upfront, thus reducing the number of frustrated students who left the free trial because they didn't have enough time”
”..without significantly reducing the number of students to continue past the free trial and eventually complete the course. “
Measuring Standard Deviation
Gross Conversion: 0.02
Net Conversion 0.0156
Expect analytical variance match empirical variance because unit of analysis and unit of diversion is same.
Sizing
Number of Samples vs. Power
Gross Conversion. Baseline: 0.20625 dmin: 0.01 = 25.839 cookies who clicks.
Net Conversion. Baseline: 0.1093125 dmin: 0.0075 = 27,411 cookies who clicks.