Homework: Chapter 10 Review Homework Save Score: 0 of 1 pt 6 of 13 (4 complete) HW Score: 30.77%... Section 10.4 Exercise 6 Question Help A survey of 300 CEOs finds that 195 of them think that the economy will improve next year. Is there evidence that the rate is higher among all CEOs than the 60% reported by the public at large? a) Find the standard deviation of the sample proportion based on the null hypothesis. b) Find the Z-statistic. c) Does the 2-statistic seem like a particularly large or small value? a) The standard deviation of the sample proportion based on the null hypothesis is (Round to three decimal places as needed.) Enter your answer in the answer box and then click Check Answer 2 parts remaining Check Answer 12