oldnew | obs | rank sum | expected |
new (0) | 6308 | 39351481 | 42774548 |
old (1) | 7253 | 52605660 | 49182593 |
combined | 13561 | 91957141 | 91957141 |
Ho: itemty~s(oldnew==new (0)) =itemty~s(oldnew==old (1))
z = -15.918
Prob > |z|= 0.0000
oldnew | mean | p50 | min | max |
new (0) | 1.451966 | 1 | 0 | 27 |
old (1) | 2.093203 | 1 | 0 | 44 |
Total | 1.794927 | 1 | 0 | 44 |