there is a claim that people living near major roads have higher blood levels of lead. 30 women living near the main road were randomly selected and the mean blood lead level was calculated as x̄1=15 and s1=5.0. in addition, 25 more women who did not live around the main road were sampled and calculated as x̄2=8.9 and s2=3.9. does this data obtained support the above claim? (test at α=0.05 significance level.)

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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.