Mathematics

Mathematics, 05.07.2019 09:30, HolliAnne

Manufacturer of batteries routinely tests its products to determine lifetime (hours of continuous usage). suppose they select a sample of 30 aaa batteries and find that the average lifetime is 1500 hours.

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Mathematics, 30.06.2019 02:50, rscott400

An article in the november 1983 consumer reports compared various types of batteries. the average lifetimes of duracell alkaline aa batteries and eveready energizer alkaline aa batteries were given as 4.1 hours and 4.5 hours, respectively. suppose these are the population average lifetimes. (a) let x be the sample average lifetime of 64 duracell and y be the sample average lifetime of 64 eveready energizer batteries. what is the mean value of x − y (i.e., where is the distribution of x − y centered)?

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Mathematics, 17.07.2019 20:30, harmonywilliams30

An article in the november 1983 consumer reports compared various types of batteries. the average lifetimes of duracell alkaline aa batteries and eveready energizer alkaline aa batteries were given as 4.1 hours and 4.5 hours, respectively. suppose these are the population average lifetimes. (a) let x be the sample average lifetime of 121 duracell and y be the sample average lifetime of 121 eveready energizer batteries. what is the mean value of x − y (i.e., where is the distribution of x − y centered)?

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Mathematics, 09.08.2019 03:20, odalysesquermon

An article in the november 1983 consumer reports compared various types of batteries. the average lifetimes of duracell alkaline aa batteries and eveready energizer alkaline aa batteries were given as 4.1 hours and 4.5 hours, respectively. suppose these are the population average lifetimes. (a) let x be the sample average lifetime of 121 duracell and y be the sample average lifetime of 121 eveready energizer batteries. what is the mean value of x − y (i.e., where is the distribution of x − y centered)?

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