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In a Test of Physical Fitness, a Group of Men μ\mu

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In a test of physical fitness, a group of men ages 65 and older from a local retirement community were told to do as many sit-ups as they could.It is known the population mean μ\mu is 20 with σX=8\sigma_{X}=8 The scores for the men from the retirement community are given below.Use a two-tailed rejection region with a total area of 0.05.What is the z- value? In a test of physical fitness, a group of men ages 65 and older from a local retirement community were told to do as many sit-ups as they could.It is known the population mean \mu is 20 with \sigma_{X}=8 The scores for the men from the retirement community are given below.Use a two-tailed rejection region with a total area of 0.05.What is the z- value?

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