Complete parts (a) through (c) below. (a) Determine the critical value(s) for a right-tailed test of a population mean at the a= 0.05 level of significance with 15 degrees of freedom. (b) Determine the critical value(s) for a left-tailed test of a population mean at the a= 0.05 level of significance based on a sample size of n = 20. (c) Determine the critical value(s) for a two-tailed test of a population mean at the a=0.10 level of significance based on a sample size of n = 17. Click here to view the t-Distribution Area in Right Tail. (a) tcrit = (b) tcrit = (c) tcrit 7 ▼ ▼ (Round to three decimal places as needed.) (Round to three decimal places as needed.) (Round to three decimal places as needed.)

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