T-test critical value assuming the variances are equal

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Reference no: EM1395917

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

Reference no: EM1395917

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