In a random sample of 1022 U.S. adults, 480 think that the U.S. government is doing too little to protect the environment. In another random sample of 1008 U.S. adults taken 10 years ago, 514 think that the U.S. government is doing too little to protect the environment. At α = 0.10, can you reject the claim that the proportion of U.S. adults who think that the U.S. government is doing too little to protect the environment is less than it was 10 years ago?

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A:

Q: An education researcher claims that at most 3% of working college students are employed as teachers…

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Q: A random sample of n1 = 154 people ages 16 to 19 were taken from the island of Oahu, Hawaii, and 11…

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A:

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A:

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A: μ = 14 σ = 4.8 M = 12.5  n = 64

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.