Calculate degrees of freedom and identify the critical t value for a single-sample t test in each of the following circumstances: a. Two-tailed test, N = 8, p level of 0.10

b. One-tailed test, N = 42, p level of 0.05

a) t_{0.1,8 } =1.86 (two tailed)

b) t_{0.05,42 } =1.68 (One tailed)

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