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An independent random sample is selected from an approximately normal population with unknown standard deviation. Find the degrees of freedom and the critical t-value (t⋆) for the given sample size and confidence level.
(a) n=6, CL=90%
(b) n=21, CL=98%
(c) n=29, CL=95%
(d) n=12 ,CL=99%
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Example Exercise: 5.1 (OpenIntro Statistics), 7.1 (Advanced High School Statistics) |
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