Condence level Critical value 0.90 z"' : 1.645 0.95 z* = 1.960 0.99 z"' : 2.576 Jump to level 1 In a poll of 1000 randomly selected voters in a local election, 878 voters were against school bond measures. What is the 95% confidence interval? [ EX: 0.123 . 5X3 0723 ] [smaller value, largervalue] 2 4 Check Next X Each incorrect answer is highlighted. Expected: Confidence interval = [0.779, 0.829] The 95% confidence interval is p - m, p + m. 804 The sample proportion p is = 0.804. 1000 * p(1 -p) 0.804(1 - 0.804) The margin of error m is = 1.961 n 1000 ~0.025 Therefore, the 95% confidence interval is [p - m, p + m] = [0.804 - 0.025, 0.804 + 0.025 = [0.779, 0.829