# Question: a Determine the critical value for a right tailed test of

(a) Determine the critical value for a right-tailed test of a population mean at the α = 0.01 level of signiﬁcance with 15 degrees of freedom.

(b) Determine the critical value for a left-tailed test of a population mean at the α = 0.05 level of signiﬁcance based on a sample size of n = 20.

(c) Determine the critical values for a two-tailed test of a population mean at the α = 0.05 level of signiﬁcance based on a sample size of n = 13.

(b) Determine the critical value for a left-tailed test of a population mean at the α = 0.05 level of signiﬁcance based on a sample size of n = 20.

(c) Determine the critical values for a two-tailed test of a population mean at the α = 0.05 level of signiﬁcance based on a sample size of n = 13.

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