A journalist wants to determine the average annual salary of CEOs in the S&P 1,500. He does not have time to survey all 1,50
0 CEOs but wants to be 95% confident that his estimate is within $50,000 of the true mean. The journalist takes a preliminary sample and estimates that the standard deviation is approximately $449,300. What is the minimum number of CEOs that the journalist must survey to be within $50,000 of the true average annual salary? Remember that the z-value associated with a 95% confidence interval is 1.96.
For this case we have the following equation: y = -3x-2 The slope of the line is: m = -2 The cut point with the x axis is: (-2/3, 0) The cut point with the y axis is: (0, -2) Answer See attached image.