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Mathematics, 21.06.2019 16:50
Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?
Answers: 3
Mathematics, 21.06.2019 16:50
The parabola opens: y=√x-4 (principal square root) up down right left
Answers: 1
4y-9=15 what does y equal...
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