Question 8.61

61. Consumption of Carbonated Beverages. Refer to Exercise 57.

  1. Compute and interpret the margin of error.
  2. How large a sample size is needed to estimate to within 25 gallons with 95% confidence?
  3. How large a sample size is needed to estimate to within 5 gallons with 95% confidence?

8.1.61

(a) 7.16 gallons. We can estimate to within 7.16 gallons with 95% confidence. (b) 3 (c) 62