Another P-value Have harsher penalties and ad cam-paigns increased seat-belt use among drivers and pas-sengers? Observations of commuter traffic failed to find evidence of a significant change compared with threeyears ago. Explain what the study’s P-value of 0.17means in this context.

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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.