Yahoo! Finance makes available historical stock prices. It lists the opening, high, and low stock prices for each stock available on NYSE and NASDAQ. A file titled GEstock gives this data for General Electric (GE) for a recent 99-day period.
a. Calculate the difference between the opening and closing stock prices for GE over this time period. Then calculate the mean, median, and standard deviation of these differences.
b. Indicate what the mean in part a indicates about the relative prices of the opening and closing stock prices for GE.
c. Compare the dispersion of the opening stock prices with the difference between the opening and closing stock prices.