22.4 Watching the news. In 2013, the Pew Research Center published a report in which it was claimed that 71% of adults in the United States watch local television news. A researcher believes that significantly fewer than 71% of adults are watching local television news in 2015. To test her theory, she obtains data from a random sample of 1000 adults, and it is observed that 65% of this sample watches local television news. As a first step in conducting a statistical test of significance, the researcher will write a null hypothesis. In this example, the null hypothesis should be what?