Mathematics, 24.06.2019 08:10 AleOfficial101
Ascientist is studying the decay of a certain substance after being exposed to two different treatments. under treatment a, the substance continuously decays at a rate of 4% daily. under treatment b, another sample of the same substance continuously decays at a rate of 6.2% daily. a second scientist comes to record the amount remaining each day and only knows that there was initially less than 300 grams of the substance undergoing treatment a and at most 400 grams of the substance undergoing treatment b. what system of inequalities can be used to determine t, the number of days after which the remaining amount of each sample, y, in grams, is the same?
Answers: 2
Mathematics, 21.06.2019 20:50
An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.
Answers: 3
Ascientist is studying the decay of a certain substance after being exposed to two different treatme...
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