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What is the probability that the sample proportion

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Reference no: EM132388372

According to the IRS, the proportion of federal tax returns which paid no tax was p = 0.326. As part of a federal tax audit, IRS officials drew a random sample of n = 120 returns.

a. What is the probability that the sample proportion which paid no tax was less than 0.3?

b. What is the probability that the sample proportion which paid no tax was between 0.35 and 0.4?

c. Would it be unusual if the sample proportion was less than 0.25?

Reference no: EM132388372

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