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A chemist invented an additive to increase the lifespan of rechargeable battery. The said additive will extend on average the battery's lifespan to 48 months.
A chemist invented an additive to increase the lifespan of rechargeable battery. The said
additive will extend on average the battery's lifespan to 48 months. Test the hypothesis at
0.01 level of significance that the average lifespan is higher than 48 months.
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