Answer Happy

10 points According to a Pew Research Center study, in May 2011, 37% of all American adults had a Type numbers in the boxes. 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 360 community college students at random and finds that 137 of them have a smart phone. Then in testing the hypotheses: a H: p=0.37 versus H:p> 0.37 what is the test statistic? (Please round your answer to two decimal places.) ZE

According to a study on the effects of smoking by pregnant women on rates of asthma in their Type numbers in the boxes. children, for expectant mothers who smoke 20 cigarettes per day, 22.3% of their children Part 1:10 points developed asthma by the age of two in the US. A biology professor at a university would like to Part 2: 10 points test if the percentage is lower in another country. She randomly selects 341 women who only 20 points deliver one child and smoke 20 cigarettes per day during pregnancy in that country and finds that 67 of the children developed asthma by the age of two. In this hypothesis test, the test statistic, z = and the p-value = (Round your answers to four decimal places.)

A medical researcher is studying the effects of a drug on blood pressure. Subjects in the study Type numbers in the boxes have their blood pressure taken at the beginning of the study. After being on the medication for to points 4 weeks, their blood pressure is taken again. The change in blood pressure is recorded and used in doing the hypothesis test. Change: Final Blood Pressure - Initial Blood Pressure The researcher wants to know if there is evidence that the drug reduces blood pressure. At the end of 4 weeks, 35 subjects in the study had an average change in blood pressure of -2.4 with a standard deviation of 5.2. Find the p-value for the hypothesis test. Your answer should be rounded to 4 decimal places.