In a sample of 400 randomly chosen small companies, 252 of them offer health benefits to at least some of their workers. Therefore, the sample proportion of companies in the sample that offer health benefits to at least some of their workers is 252/400 = 0.63. (A) Calculate the standard error of the sample proportion of companies that offer health benefits to at least some of their workers. Round to two decimal places. (B) Interpret the standard error in the context of the problem.