A market researcher in Johannesburg claims that the average salary of residents of Saxonwold is more than the average salary of residents of Hyde Park. Two independent samples were taken in each neighbourhood and the sample information was as follows. Calculate the value of a suitable test statistic to test this claim.           Saxonwold                     Hyde Park               n1=38                              n2=32      x ̅1=1 100 000                  x ̅2=1 050 000           s1=150 000                    s2=200 000 A.  495.14 B.  -1.16 C.  1.16 D.  -2.21 E.  2.21

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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.