== Sydney test analyzed == 

 I've nothing against a more detailed look at the statistics, but the suggested edit is also "of dubious mathematical validity". The chance of the water results may have been 1 in a hundred, but the chance that some one of the three tests would yield results at the 0.01 level is significantly larger. (I suppose 1 in 33.) Also, it would be helpful to have a reference to Arthur C. Clarke's statement, among other things to check whether they have been taken out of context.