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CHAPTER Hypothesis Testing with One Sample
www.pearsonhighered.com5.5 230 ≈ 1. In the figure below, notice that the sample mean of . x = 47 miles per gallon is highly unlikely—it is about 3 standard errors . 1. z. ≈ -2.992 from the claimed mean! Using the techniques you studied in Chapter 5, you can determine that if the advertisement is true, then the probability of obtaining a sample mean of 47 or ...