Question

In a test of the effectiveness of a new battery design, 16 battery-powered music boxes are...

In a test of the effectiveness of a new battery design, 16 battery-powered music boxes are
randomly provided with either the old design or the new version. Hours of playing time before
battery failure were as follows:
8 boxes new battery type
3.3 6.4 3.9 5.4 5.1 4.6 4.9 7.2 hours
8 boxes old battery type
4.2 2.9 4.5 4.9 5.0 5.1 3.2 4.0 hours
Assuming normal populations with equal standard deviations, use 0.10 level to determine
whether the new battery could be better than the old design.

Math   Statistics-And-Probability   
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