Data show that men between the ages of 20 and 29 in a general population have a mean height of 69.3 inches, with a standard deviation of 2.9 inches. A baseball analyst wonders whether the standard deviation of heights of major-league baseball players is less than 2.9 inches. The heights (in inches) of 20 randormly selected players are shown in the table. E Click the icon to view the data table. Test the notion at the a= 0.05 level of significance. What are the correct hypotheses for this test? The null hypothesis is Ho: o = 2.9. The alternative hypothesis is H,: o <2.9.

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.