The IRS indicates that 90% of all tax returns are filed electronically. Assume that figure is correct. Suppose a representative sample of 250 returns is selected. What is the probability that fewer than 85% of the sample will have filed electronically?

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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2. The IRS indicates that 90% of all tax returns are filed
electronically. Assume that figure is correct. Suppose a
representative sample of 250 returns is selected. What is the
probability that fewer than 85% of the sample will have filed
electronically?
Transcribed Image Text:2. The IRS indicates that 90% of all tax returns are filed electronically. Assume that figure is correct. Suppose a representative sample of 250 returns is selected. What is the probability that fewer than 85% of the sample will have filed electronically?
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