I have been struggling at this please help
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Answers: 2
Mathematics, 21.06.2019 16:50, gesic2003
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 22:00, huangjianhe135
The difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.
Answers: 1
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