Find the z-score that has 20.9 % of the distribution's area to its left.
please help !! ASAP...
Mathematics, 20.09.2020 15:01 Sumaiyajr2567
Find the z-score that has 20.9 % of the distribution's area to its left.
please help !! ASAP
Answers: 1
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Write a fraction less than 1, which has a denominator of 6 and is greater than 3/4 plz answer !
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An automobile assembly line operation has a scheduled mean completion time, ÎĽ, 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.
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