1. Assume a random sample of N measurements is selected from a population with a sample size of 25 and a standard deviation of 40. What is o<>

a. 16

b. 8

c. 20

d. 10

2. The Internal Revenue Service (IRS) audited 1,242,429 individual tax returns in the year 2013. A total of 145,236,429 individual filed tax returns that year. Also in 2013, the IRS audited 25,905 corporate tax returns out of a total 1,924,887 filed. What is the probability that your tax return was not selected for an audit in 2013? Assume you filed only one individual return that year, and assume that returns are selected for audits at random.

a. .0135

b. .9865

c. .9914

d. .0086