These five are all one chain of logic, not five separate ideas:
Z-score asks: "how many standard errors is the average return away from zero?" — the bigger the number (positive or negative), the less likely the average return we measured is just random noise around a true average of zero.
P-value converts that Z-score into a probability: specifically, the odds you'd see a result this extreme (or more) purely by chance if the true average return were actually zero. Lower = more confident there's a real effect, not luck.
Confidence Score is just (1 − P-value) × 100 — the same information as P-value, flipped into an intuitive 0-100 scale where higher is better.
Confidence Interval uses the same standard error as the Z-score to give a range: "95% of the time, the true average return would fall somewhere in this band." A wide band means the point estimate (Average Return) is uncertain even if the sign is consistent.
Data Quality is the blunt, sample-size-only version of all of the above — a quick sanity check before you even look at the p-value.
Rule of thumb: a great Sharpe Ratio or Kelly % computed on a Low/Insufficient Data Quality sample should be trusted much less than a mediocre one computed on High Data Quality — always check this row first.