Question

1. A study was conducted on the life of Duracell batteries and on the life of Energizer batteries. The study found that a sample of 10 Duracell batteries had a mean life in hours of 26.2 with a standard deviation of 4.1 and a range of 24. The results for a sample of 10 Energizer batteries were as follows (in hours):

15 18 19 23 25 25 28 30 34 38


Which batteries have a more uniform life in hours? Why? (Your explanation should contain direct references to chapter 3 concepts.)