Marketers believe that 92% of adults in the United States own a cell phone. A cell phone manufacturer believes that number is actually lower. 200 American adults are surveyed, of which, 174 report having cell phones. Use a 5% level of significance. 1. Determine what type of test this is, A, B or C? A: Single population mean with standard deviation known. B. Single population mean with standard deviation not known. C. Single population proportion 2. Identify the null hypothesis, A, B, C or D? A. p >0.92 B. p 0.92 B. p