Question

4)A quality control engineer at a potato chip company tests the bag filling machine by weighing bags of potato chips. Not every bag contains exactly the same weight. But if more than 18% of bags are over-filled then they stop production to fix the machine. They define over-filled to be more than 1 ounce above the weight on the package. The engineer weighs 182 bags and finds that 50 of them are over-filled. He plans to test the hypotheses H 0 : p = 0.18 versus H a : p > 0.18. What is the test statistic? z = 5)According to a Pew Research Center study, in May 2011, 36% of all American adults had a smart phone (one which the user can use to read email and surf the Internet). A communications professor at a university believes this percentage is higher among community college students. She selects 398 community college students at random and finds that 174 of them have a smart phone. Then in testing the hypotheses: H 0 : p = 0.36 versus H a : p > 0.36, what is the test statistic?

Answer 1

4) Test statistic

= 3.33

5. Test statistic

= 3.21