8.1.19 The test statistic of z = 2.04 is obtained when...

8.1.19 The test statistic of z = 2.04 is obtained when testing the claim that p ? 0.554. (a) Identify the hypothesis test as being two-tailed, left-tailed, or right-tailed. (b) Find the P-value. (Round to three decimal places as needed.) (c) Using a significance level of ? = 0.10, should we reject H0 or should we fail to reject H0?

Incomes: Lawyers and Architects How do the average weekly incomes of lawyers and architects compare? A random sample of 18 regions in the United States gave the following information about average weekly incomes (in dollars) (Reference: U.S. Department of Labor, Bureau of Labor Statistics). $$ \begin{array}{l|ccccccccc} \hline \text { Region } & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 \\ \hline \text { Lawyers } & 709 & 898 & 848 & 1041 & 1326 & 1165 & 1127 & 866 & 1033 \\ \hline \text { Architects } & 859 & 936 & 887 & 1100 & 1378 & 1295 & 1039 & 888 & 1012 \\ \hline \\ \hline \text { Region } & 10 & 11 & 12 & 13 & 14 & 15 & 16 & 17 & 18 \\ \hline \text { Lawyers } & 718 & 835 & 1192 & 992 & 1138 & 920 & 1397 & 872 & 1142 \\ \hline \text { Architects } & 794 & 900 & 1150 & 1038 & 1197 & 939 & 1124 & 911 & 1171 \\ \hline \end{array} $$

Understandable Statistics Concepts and Methods

Nonparametric Statistics

The Sign Test for Matched Pairs

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