Two Teams, Two Estimates

A company has $2{,}000{,}000$ customers. Suppose that the mean monthly spend across all $2{,}000{,}000$ customers is exactly ₹1,900 — a value we know here, but that the researchers below do not know.

• Team A surveys $2{,}500$ customers chosen at random and computes a mean monthly spend of ₹1,850.
• Team B independently surveys a different $2{,}500$ customers, also chosen at random, and computes ₹1,925.

Both surveys were conducted correctly.

Which statement about these three numbers is correct?