Question: using TI-84 calculator No for using table please i need help and explanation According to the IRS, the proportion of federal tax returns which paid

using TI-84 calculator No for using table please i need help and explanation

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?

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