A federal report indicated that 23% of children under age 6 live in poverty in Ohio, an increase over previous years. How large a sample is needed to estimate the true proportion of children under age 6 living in poverty in Ohio within 4% with 90% confidence? Round the intermediate calculations to three decimal places and round up your final answer to the next whole number. n=

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Q: ne the test statistic. Round to two decimal places as needed.

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A: Given that, A recent study indicated that 24% of the 137 women over age 55 in the study were widows.…

Q: A CBS News poll conducted June 10 and 11, 2006, among a nationwide random sample of 651 adults,…

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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.