Problem
Score on last try: 0.6 of 1 pts. See Details for more. \( > \) Next question \( \rightleftarrows \) Get a similar question You can retry this question below Hypothesis Test for a Population Proportion A well-known brokerage firm executive claimed that \( 80 \% \) 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 200 people, \( 74 \% \) of them said they are confident of meeting their goals. Test the claim that the proportion of people who are confident is smaller than \( 80 \% \) at the 0.01 significance level. The null and alternative hypothesis would be: \[ \begin{array}{cccccc} H_{0}: \mu=0.8 & H_{0}: \mu \geq 0.8 & H_{0}: p \leq 0.8 & H_{0}: p=0.8 & H_{0}: \mu \leq 0.8 & H_{0}: p \geq 0.8 \\ H_{1}: \mu \neq 0.8 & H_{1}: \mu<0.8 & H_{1}: p>0.8 & H_{1}: p \neq 0.8 & H_{1}: \mu>0.8 & H_{1}: p<0.8 \end{array} \] The test is: left-tailed two-tailed right-tailed \( o^{6} / \)
Solution
Step 1 ：H_0: p=0.8
Step 2 ：H_1: p<0.8
Step 3 ：The test is left-tailed
