Statistical Sciences 2244A/B Lecture Notes - Lecture 10: Sampling Distribution, Dont
15 Jan 2017
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Lecture 010 - confidence intervals ii (t ci for mu - unknown) Distinguish between appropriateness of t ci for versus z ci for . Use the t distribution table to find t-values and probabilities, given appropriate information. Correctly assess the validity of assumptions for t ci for . Compute a t ci for , given appropriate information. Identify strategies for, and things that influence the precision of a ci for . Thus we estimate with s we can not use the z-scores. Estimating the sd of the sampling distribution generates standard error is not normal. Correspond to degrees of freedom and confidence levels. Have limited probabilities included - usually the most common (reasonable) probability. Probabilities tells the area inside the tails. Also since there are less probabilities available, sometimes we can not calculated the actual value but have to use a range. Have to use the positive values to calculate the negative ones.
