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There are two types of dependent samples: Those that measure something before and after an "event" and those that matching two samples of the same phenomena being observed. Which of the following is NOT true about such a test:

a.We calculate the mean of the differences between the paired observations

b.We must calculate the standard deviation of their paired observation differences.

c.The variation of the differences of the paired samples is greater than when the two samples are considered to be independent of each other. This will result in a smaller likelihood of rejecting the null hypothesis.

d.The standard error of the paired, dependent statistic will result in a higher likelihood of rejecting the null hypothesis.

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