Table 4 Z-test: comparison of two samples for means of the bottom, middle, and upper levels of respective v1 and v2
Variety 1 | Variety 2 | |||||
|---|---|---|---|---|---|---|
Bottom | Middle | Upper | Bottom | Middle | Upper | |
Mean °Brix (%) | 13.26 | 16.18 | 15.695 | 14.307 | 17.01 | 16.593 |
Known variance | 6.800 | 5.761 | 4.654 | 5.789 | 4.237 | 4.291 |
Observations | 60 | 60 | 60 | 60 | 60 | 60 |
Hypothesized Mean Difference | 0 | 0 | 0 | |||
Z (computed) | − 2.285 | − 2.033 | − 2.327 | |||
P (Z ≤ z) two-tail | 0.022 | 0.042 | 0.020 | |||
z Critical two-tail | 1.960 | 1.960 | 1.960 | |||