Complete parts ​(a) through ​(c) below. ​(a) Determine the critical​ value(s) for a​ right-tailed test of a population mean at the a=0.10 level of significance with 20 degrees of freedom. ​(b) Determine the critical​ value(s) for a​ left-tailed test of a population mean at the a=0.01 level of significance based on a sample size of n=10. ​(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 nequals=11   (a) t Subscript crittcritequals= ▼   plus+ minus− plus or minus± nothing ​(Round to three decimal places as​ needed.) ​(b) t Subscript crittcritequals= ▼   plus or minus± plus+ minus− nothing ​(Round to three decimal places as​ needed.) ​(c) t Subscript crittcritequals= ▼   minus− plus+ plus or minus± nothing ​(Round to three decimal places as​ needed.)   Enter your answer in each of the answer boxes.

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Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.