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A medical researcher is interested in whether patient's left arms or right arms are longer. if 14 patients participate in this study (so that n left arms and n right arms are measured), how many degrees of freedom should the researcher use in her t-test critical value assuming that the variances are equal?
A) 13
B) 27
C) 14
D)26
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How many degrees of freedom should the researcher use in her t-test critical value assuming that the variances are equal?
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