A recent article in The Wall Street Journal entitled "As Identity Theft Moves Online, Crime Rings Mimic Big Business" states that 39% of the consumer scam complaints by American consumers are about identity theft. Suppose a random sample of 90 complaints is obtained. Of these complaints, 40 were regarding identity theft. Based on these sample data, what conclusion should be reached about the statement made in The Wall Street Journal? (Test using α= 0.10.) A) Since z = 1.947 1.645, we reject the null hypothesis. There is sufficient evidence to conclude that the 0.39 rate quoted in the WSJ article is wrong. B) Since z = 2.033 1.96, we reject the null hypothesis. There is sufficient evidence to conclude that the 0.39 rate quoted in the WSJ article is wrong. C) Since z = 1.341

Question

A recent article in The Wall Street Journal entitled "As Identity Theft Moves Online, Crime Rings Mimic Big Business" states that 39% of the consumer scam complaints by American consumers are about identity theft. Suppose a random sample of 90 complaints is obtained. Of these complaints, 40 were regarding identity theft. Based on these sample data, what conclusion should be reached about the statement made in The Wall Street Journal? (Test using α= 0.10.) A) Since z = 1.947 > 1.645, we reject the null hypothesis. There is sufficient evidence to conclude that the 0.39 rate quoted in the WSJ article is wrong. B) Since z = 2.033 > 1.96, we reject the null hypothesis. There is sufficient evidence to conclude that the 0.39 rate quoted in the WSJ article is wrong. C) Since z = 1.341 < 1.645, we do not reject the null hypothesis. There is insufficient evidence to conclude that the 0.39 rate quoted in the WSJ article is wrong. D) Since z = 0.97 < 1.645, we do not reject the null hypothesis. There is insufficient evidence to conclude that the 0.39 rate quoted in the WSJ article is wrong.

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The Answer of A recent article in The Wall Street Journal entitled "As Identity Theft Moves Online, Crime Rings Mimic Big Business" states that 39% of the consumer scam complaints by American consumers are about identity theft. Suppose a random sample of 90 complaints is obtained. Of these complaints, 40 were regarding identity theft. Based on these sample data, what conclusion should be reached about the statement made in The Wall Street Journal? (Test using α= 0.10.) A) Since z = 1.947 > 1.645, we reject the null hypothesis. There is sufficient evidence to conclude that the 0.39 rate quoted in the WSJ article is wrong. B) Since z = 2.033 > 1.96, we reject the null hypothesis. There is sufficient evidence to conclude that the 0.39 rate quoted in the WSJ article is wrong. C) Since z = 1.341 < 1.645, we do not reject the null hypothesis. There is insufficient evidence to conclude that the 0.39 rate quoted in the WSJ article is wrong. D) Since z = 0.97 < 1.645, we do not reject the null hypothesis. There is insufficient evidence to conclude that the 0.39 rate quoted in the WSJ article is wrong.

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