The overall proportion, p, of rooms that reused towels is calculated as follows: p = Number of successes / Total number of trials p = 686 / 1595 p = 0.430 This means that, overall, 43% of the rooms reused their towels. calculate the standard error of a group proportion by computing (p(1 p)/n), where p is the overall proportion found in #7 and n is the sample size for the ith group. Find the standard error of the group proportion for each of the five groups