Find standard deviation of ages if oldest textbook is known
Out of a total of 10 college textbooks estimate the standard deviation of their ages if the oldest textbook is known to be 7.9 years old and the newest textbook is 1.3 years old.
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The next two questions refer to the following table where x= the number of days per week that 100 clients use a particular exercise facility. Complete the column of cumulative frequency
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Question: A black and red die are thrown and let X be a random variable denoting the sum of the dice
If the civil service wishes to set a cut-off score on the exam so that 15% of the test takers fail the exam, what should the cut-off score be?
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