A manufacturer claims that its rechargeable batteries can be charge 500 or more times. A random sample of 50 batteries has a mean life of 505 charges. The standard deviation is 10. Is there enough evidence to support this claim at 1% level of significance?

A manufacturer claims that its rechargeable batteries can be charge 500 or more times. A random sample of 50 batteries has a mean life of 505 charges. The standard deviation is 10. Is there enough evidence to support this claim at 1% level of significance?

Sustainable Energy

2nd Edition

ISBN:9781337551663

Author:DUNLAP, Richard A.

Publisher:DUNLAP, Richard A.

Chapter16: Biomass Energy

Section: Chapter Questions

Problem 4P

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Backup System

The energy from fossil fuels like petroleum, coal, and natural gas is one of the primary energy resources that powers the whole world, be it power generation or automobiles. But unfortunately, these resources are on the verge of extinction due to their overexploitation and the level of pollution they cause to the environment. Carbon emission is one of the worst by-product from burning fossil fuels. Gas such as carbon dioxide is the primary culprit of the greenhouse effect and global warming. Also, these energy resources fall under the category of non-renewable energy sources as they will lead to extinction in the near future. Due to these reasons, humans are continuously in search of such resources, which may serve as backup sources to fuel their daily needs once these non-renewable energy resources get exhausted. These resources are non-polluting as well as add to long-term sustainability. All renewable energy sources, hybrid energy sources, clean energy sources, etc. fall under the category of backup energy systems.

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