A Company Has Developed a New Ink-Jet Cartridge for Its

question 129

Short Answer

A company has developed a new ink-jet cartridge for its printer that it believes has a longer lifetime on average than the one currently being produced.To investigate its length of life,40 of the new cartridges were tested by counting the number of high-quality printed pages each was able to produce.The sample mean and standard deviation were determined to be 1511.4 pages and 35.7 pages,respectively.The historical average lifetime for cartridges produced by the current process is 1502.5 pages.Calculate the appropriate test statistic to test the hypotheses.

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Definitions:

Death Rate

The average number of deaths per unit of population over a given period of time.

Ecological Footprint

A measure of how much land and water area a human population requires to produce the resources it consumes and to absorb its wastes, using prevailing technology.

Earth's Surface

The outermost layer of the Earth that includes both land and water bodies.

Demographic Transition

A model that describes the transformation of countries from having high birth and death rates to low birth and death rates as part of economic development.