Say you have m coins. All the coins are unbiased, except one biased coin which comes up heads with probability 1/2 + , for some 0 lt; lt; 1/2 .

Say you have m coins. All the coins are unbiased, except one biased coin which comes up heads with probability 1/2 + ρ, for some 0 < ρ < 1/2 . You toss each of the coins n times exactly, and you count the number of heads you observe, say