Question

Problem 18) In order to make inference about average time SHSU students check their emails, a sample of 9 students was surveyed for how many times a day they check their emails. The responses were recorded as 20, 19, 15, 13. 27. 29. 19. 22. 25. (Question) Interpretation: We are confidence that the true average time SHSU students check their emails is between the lower bound and the upper bound. QUESTION 19 Problem 19) For a project that investigates the average weight of patients from the Mayo clinic the researcher collected a sample of 64 patients and obtained the sample average is 150 lbs. Based on some publications, the researcher also figured out the population standard deviation of patients weight is 16 lbs. (Question) if you want to find a 9ow confidence interval, what is the Margin of error?

Answer 1

19) SO1 given Sample size (o)=64 Sample average (%)=150 standard deviation eo) = 16 Margin error Zare at qo1 confidence interval Zal = 1.645 c.margin error = 2 = 1.645 116 cm = 1.695 lis) = 1,645(2) margin error =(3-29) e = The qor conficence Interval & 12h im 1501(1.645)763 164 1561 44.645) 16 51501(1.64532 E150 13:29 = (150-3.29, 150 a 3.299 (146.71, 153.29) The confidence interrat at 90%. is (146.71,153.292 C2 =