For a population with a normal distribution with mean
22.522.5
and a standard deviation<...
Mathematics, 08.08.2019 01:30 kiera2599
For a population with a normal distribution with mean
22.522.5
and a standard deviation
2.82.8,
determine the following.
(a) about 68% of the population lies between what limits?
(b) about 95% of the population lies between what limits?
(c) about 99.7% of the population lies between what limits?
Answers: 2
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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
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