Question

D Sun 11:02 PV Carreton-out osios LINTRO + my Suis W. Hi Teatro Countdown: Days - Time-oo-56:22 Dean Halverson recently read that full-time college students study w a s in the each week. She decides to do a study at her university to see if there is evidence that students study an average of more than 20 hours each week. A random sample of 30 students were asked to keep a diary of their activities over a period of several weeks. It was found that the average number of hours that the students studied each week was 21.5 hours. The sample standard deviation of 34 hours Find the p-value The p-value should be rounded to 4-decimal places Question 14 A medical researcher is studying the effects of a drug on wood pressure Teeth Subjects in the study have their blood pressure taken at the beginning of the study. After being on the medication for 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 evidencd that the drug reduces blood pressure. At the end of 4 weeks, 33 ects in the study had an average change in Nood pressure of 2 with a standard deviation of 54 Find the p-value for the hypothesis test. Your answer sh e rounded to decimal places Questionar

Answer 1

The calculation for test statistic and P-value is given as, The hypothesis is; H.: u = 20 versus H;u > 20 -u => 21.6-20 34 => 4 => 2.5775 530 To And, P-value = P(t> 2.5775) => 0.0077 14. The calculation for test statistic and P-value is given as, The hypothesis is; Ho: l = 0 versus H1:4 0 X-u -2.9-0 I start 54 5 -> -3.0379 And, P-value=P(t<-3.0379) => 0.0024