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.
6.30 Changing the confidence level.
In the setting of Exercise 6.28, would the margin of error for 99% confidence be larger or smaller? Verify your answer by performing the calculations.