Final answer:
The formula for Hamming code error correction method involves the use of redundant bits for error detection and correction.
Step-by-step explanation:
The formula for Hamming code error correction method is:
r1 = p1 + p2 + d1 + p4
r2 = p1 + d2 + d3 + p4
r3 = d1 + d2 + d3 + p2
r4 = p3 + d1 + d2 + d3
Where r1, r2, r3, and r4 are the redundant bits used for error detection and correction.
p1, p2, p3, and p4 are the parity bits, and d1, d2, and d3 represent the data bits.