Merg. There are contradictory assumptions here. For the approximation on the standard deviation you assume duration is a Poisson random variable. To use the t-test you assume duration is a normally distributed r.v.…
Merg. There are contradictory assumptions here. For the approximation on the standard deviation you assume duration is a Poisson random variable. To use the t-test you assume duration is a normally distributed r.v.…