The production manager of a battery factory wishes to determine whether the average life expectancies of batteries manuf

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The production manager of a battery factory wishes to determine whether the average life expectancies of batteries manuf

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The Production Manager Of A Battery Factory Wishes To Determine Whether The Average Life Expectancies Of Batteries Manuf 1
The Production Manager Of A Battery Factory Wishes To Determine Whether The Average Life Expectancies Of Batteries Manuf 1 (186.13 KiB) Viewed 76 times
The production manager of a battery factory wishes to determine whether the average life expectancies of batteries manufactured by two machines are different. A random sample of 36 batteries produced by machine I shows a sample mean of 375 hours and a standard deviation of 110 hours, and a random sample of 36 batteries produced by machine II indicates a sample mean of 362 hours and a standard deviation of 125 hours. Using the 1% level of significance, is there any evidence of difference in the average life expectancies of the batteries produced by the two machines?-
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