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A chemical engineer has been working on developing a new type of candle wax made from coconut oil. The engineer wonders how the amount of time that a candle made of coconut oil wax will burn compared to the time that a candle made of beeswax will burn.

After gathering the appropriate data and ensuring that the necessary conditions have been satisfied, which type of significance test should the engineer conduct?


A one-sample $t$-test for a population mean.


A two-sample $t$-test for the difference in population means.


A matched pairs $t$-test for the difference in a population mean.


A $z$-test for a population proportion.


A ${ \chi }^{ 2 }$ test for goodness of fit.

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