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D2 =81-1 find the positive value of d that makes the equation true
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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?
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Iq scores for adults age 20 to 34 years are normally distributed according to n(120, 20). in what range does the middle 68% of people in this group score on the test?
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The graph shows the distance kerri drives on a trip. what is kerri's speed?
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D2 =81-1 find the positive value of d that makes the equation true...
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