Chapter 9: Hypothesis Tests for a Single Population Proportion Score: 4/14 4/14 answered Question 3 A well-known brokerage firm executive claimed that 40% of investors are currently confident of meeting their investment goals. An XYZ Investor Optimism Survey, conducted over a two week period, found that in a sample of 400 people, 48% of them said they are confident of meeting their goals. Test the claim that the proportion of people who are confident is larger than 40% at the 0.05 significance level. The null and alternative hypothesis would be: Ho: u 0.4 Ho:p = 0.4 Ho:p > 0.4 Ho:/ = 0.4 H1: p > 0.4 H1:p > 0.4 H1 : p