Question: A study of 658 CEOs conducted by the Conference Board reported that 250 stated that their company's greatest concern was sustained and steady top-line growth ( CEOs Greatest Concerns, USA Today Snapshots, May 8, 2006, p. 1D).
a. Construct a 95% confidence interval for the proportion of CEOs whose greatest concern was sustained and steady top-line growth.
b. Interpret the interval constructed in (a).
c. To conduct a follow-up study to estimate the population proportion of CEOs whose greatest concern was sustained and steady top-line growth to within ±0.01 with 95% confidence, how many CEOs would you survey?