Asked by Chloe
You have to choose a battery brand to use in your smoke alarm. Company A's batteries have a mean lifespan of 1.2 years, with a standard deviation of 0.1 years. Company B's batteries have a mean lifespan of 1.5 years, with a standard deviation of 0.9 years. Which brand would you choose, and why?
Answers
Answered by
PsyDAG
Assuming a normal distribution:
95% A = 1.2 ± 2 * .1
95% B = 1.5 ± 2 * .9
95% A = 1.2 ± 2 * .1
95% B = 1.5 ± 2 * .9
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