A simple random sample of 15-year old boys from one city is obtained and their weights (in pounds) are listed below. What is the 0.01 significance level to test the claim that these sample weights come from a population with a mean equal to 147 lb. Assume that the standard deviation of the weights of all 15- year old boys in the city is known to be 16.7 146 140 160 151 134 189 157 144 175 127 164?

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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.