For Exercises 6.23 to 6.25, see page 304; for 6.26 and 6.27, see pages 305–306; for 6.28 to 6.30, see page 309; for 6.31 and 6.32, see page 311; and for 6.33, see page 313.
6.24 Use the 68–95–99.7 rule.
In the setting of the previous exercise, the 68–95–99.7 rule says that the probability is about 0.95 that is within ________ of the population mean . Fill in the blank.