Solution :
This is the right tailed test .
sample size = n = 15
Degrees of freedom = df = n - 1 = 15-1 = 14
a) t0 = 2.35
p-value = 0.0170
b) t0 = 3.55
p-value = 0.0016
c)
t0 = 1.55
p-value = 0.0717
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