?Using Correct Distribution. In Exercises 5–8, assume that we want to construct a
Chapter 7, Problem 8(choose chapter or problem)
Using Correct Distribution. In Exercises 5–8, assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) Find the critical value \(t_{\alpha / 2}\), (b) find the critical value \(z_{\alpha / 2}\), or (c) state that neither the normal distribution nor the t distribution applies.
Birth Weights Here are summary statistics for randomly selected weights of newborn girls: n = 205, \(\bar{x}\) = 30.4 hg, s = 7.1 hg (based on Data Set 4 “Births” in Appendix B). The confidence level is 95%.
Text Transcription:
t_{\alpha / 2}
z_{\alpha / 2
\bar{x}}
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