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There are 15 numbers on a list, and the mean is 25. The smallest number on the list is changed from 12.9 to 1.29.
a. Is it possible to determine by how much the mean changes? If so, by how much does it change?
b. Is it possible to determine the value of the mean after the change? If so, what is the value?
c. Is it possible to determine by how much the median changes? If so, by how much does it change?
d. Is it possible to determine by how much the standard deviation changes? If so, by how much does it change?
What do we know about the behavior of the sample mean ( X ) in this setting? B) If the sociologist decides to scale down his study and draw a sample of n =10.
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Workers at a large toxic clean up project are concerned that their white blood cell counts may have been reduced. Let x be a random variable that represents white blood cell count per cubic millimeter of whole blood in a healthy adult.
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uppose that the protion of all invoices that were paid late is 20 percent. In a random sample of 140 invoices, determine the probability that more than 28 percent invoices were paid late.
random sampling from four treatments produced the following
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