If We Want to Perform a Two-Tail Test for Differences $p _ { 1 } - p _ { 2 }$

question 27

True/False

If we want to perform a two-tail test for differences between two populations of nominal data with exactly two categories, we can employ either the z-test of $p _ { 1 } - p _ { 2 }$ , or the chi-squared test of a contingency table. (Squaring the value of the z-statistic yields the value of the $x ^ { 2 }$ -statistic.)

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Rule of 70

A formula used to estimate the number of years required for an investment or the economy's output to double, calculated by dividing 70 by the annual growth rate.

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