Determine the degrees of freedom for t-test

Reference no: EM1321610

A medical researcher is interested in whether patients\\\' 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: EM1321610

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