Write the null and alternative hypotheses you would use to test each of the situations in parts (a) through (c). (a) A president is concerned about his "negatives," that is, the percentage of the country's residents who express disapproval of his job performance His political committee pays for a series of TV ads, hoping that they can keep the negatives below 57%. They will use follow up polling to assess the ads' effectiveness. Let p be the proportion of the country's residents who express disapproval of the president's performance. Ho: p 1 0.57 HA p 7 0.57 (b) Is a our-section spinner fail\"? Let p represent the probability of the spinner landing on any particular section. 1 1 Ho: P l I 1 HA: p Y I (1:) Only about 15% of people who try to gain self-condence succeed. Sellers of a motivational tape claim that listening to the recorded messages can help people succeed. Let p be the proportion of people who try to gain self-condence and succeed. Ho:p 0.15 HA: p 0.15 |