The proportion of all high school students who watch national news is p = 0. 57. A random sample of 60 high school students is selected. Which of the following is the correct calculation and interpretation of the standard deviation of the sampling distribution of p hat ? Sigma Subscript p hat = 0. 004 In SRSs of size 60, the sample proportion of high school students who watch the national news typically varies 0. 004 from the true proportion, p = 0. 71. Sigma Subscript p hat = 0. 064 In SRSs of size 60, the sample proportion of high school students who watch the national news typically varies 0. 064 from the true proportion, p = 0. 71. Sigma Subscript p hat = 0. 245. In SRSs of size 60, the sample proportion of high school students who watch the national news typically varies 0. 245 from the true proportion, p = 0. 71. Sigma Subscript p hat = 0. 570. In SRSs of size 60, the sample proportion of high school students who watch the national news typically varies 0. 570 from the true proportion, p = 0. 71.