the following graph represents the probability histogram for the number of heads in 100 tosses of a fair coin. assume that in one realization of this statistical experiment, the draws come out as: 60 1's and 40 0's. for each number below, find the phrase which describes it. a) expected value of the # of heads. b) chance error in the sum of the draws. c) observed value for the sum of the draws. d) standard error for the sum of the draws. options: 50, 5, 10, 60