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Unformatted text preview: um of the upper and lower tail probabilities. This is equivalent to saying that the p‐value is double the upper tail probability. 21 Chapter 10 With a significance level of α = 0.05, since the calculated p‐value exceeds the chosen significance level, the null hypothesis is not rejected. The evidence in the data set is that the bottles of shampoo are being packaged to a correct standard. The same conclusion is found by comparing the t‐test statistic to the t‐distribution critical value. In the Appendix Table for...
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 Spring '10
 WHISTLER

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