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Two Types of Flares Were Tested for Their Burning Times  Brand X\text { Brand } \mathrm { X }

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Two types of flares were tested for their burning times (in minutes).Sample results are given below.  Brand X\text { Brand } \mathrm { X }  Brand Y\text { Brand } \mathrm { Y } n = 35 n = 40 x\overline{x} = 19.4 x\overline{x} = 15.1
s = 1.4 s = 0.8
Refer to the sample data to test the claim that the two populations have unequal means.Carry out the test with a 1% significance level.

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