Question 8.62

62. Stock Shares Traded. Refer to Exercise 58.

  1. Calculate and interpret the margin of error.
  2. How large a sample size (trading days) is needed to estimate the population mean number of shares traded per day to within 100 million with 95% confidence?
  3. How large a sample size (trading days) is needed to estimate the population mean number of shares traded per day to within 10 million with 95% confidence? Into how many years does this number of days translate?