A 90% confidence interval for the average salary of all CEOS in the electronics industry was constructed using the results of a random survey of 45 CEOS. The interval was ($124443, $140,235). Give a practical interpretation of the interval. 90% of all CEOS in the electronics industry have salaries that fall between $124,443 to $140,235. We are 90% confident that the mean salary of the sampled CEOS falls in the interval $124,443 to $140,235. We are 90% confident that the mean salary of all CEOS in the electronics industry falls in the interval $124,443 to $140,235. 90% of the sampled CEOS have salaries that fell in the interval $124,443 to $140,235.