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13 Mar
2020

Find the 99% confidence interval | Good Grade Guarantee!

1. Survey on Inevitability of War A sample of 200 teenagers shows that 50 believe that war is inevitable, and a sample of 300 people over age 60 shows that 93 believe war is inevitable. Is the proportion of teenagers who believe war is inevitable different from the proportion of people over age 60 who do? Use a = 0.01. Find the 99% confidence interval for the difference of the two proportions.
2. Hypertension It has been found that 26% of men 20 years and older suffer from hypertension (high blood pressure) and 31.5% of women are hypertensive. A random sample of 150 of each gender was selected from recent hospital records, and the following results were obtained. Can you conclude that a higher percentage of women have high blood pressure? Use a = 0.05.
Men 43 patients had high blood pressure Women 52 patients had high blood pressure

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