Markets have become interested in the potential of social networking sites. But they need to understand the demographics of social networking users. May-2010 Aug-2011 Aug-2012 Total A research company conducted a survey in late 2012 that asked about 18-29 275 281 305 861 social networking over several years and for different age groups. A table of 30-49 315 363 380 1058 responses is shown to the right. 50-64 259 277 323 859 Total 849 921 1008 2778 a) Under the usual null hypothesis, what are the expected values? Complete the table below. May-2010Aug-2011Aug-2012 18-29 30-49 50-64 (Round to two decimal places as needed.) b) Compute the x statistic. x2 =(Round to two decimal places as needed.) c) How many degrees of freedom does the x statistic have? of =(Type an integer or a decimal.) d) What do you conclude? Find the critical value for a = 0.05. x2 =(Round to two decimal places as needed.) What is the conclusion? the critical value. There is evidence to reject Ho. The test statistic is Time Remaining: 00:32:46 Next