A research report on a prospective study states that: “A comparison of the 90 normal patients with the 50 patients with hypotension shows that only 3.33% of the former group died as compared to 30% of the latter.” (a) Put these data into a 2x2 contingency table and calculate the sample risk difference, construct a 95% confidence interval and provide an interpretation. (b) Calculate sample relative risk, construct 95% confidence interval, and provide interpretation.

A research report on a prospective study states that: “A comparison of the 90 normal patients with the 50 patients with hypotension shows that only 3.33% of the former group died as compared to 30% of the latter.” (a) Put these data into a 2x2 contingency table and calculate the sample risk difference, construct a 95% confidence interval and provide an interpretation. (b) Calculate sample relative risk, construct 95% confidence interval, and provide interpretation.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter4: Equations Of Linear Functions

Section: Chapter Questions

Problem 8SGR

See similar textbooks

Similar questions

What is meant by the sample space of an experiment?
In a situation where the sample size was decreased from 39 to 29 in a normally distributed data set, what would be the impact on the confidence interval?
A researcher computed a 90% confidence interval for the proportion of students who smoke. If the researcher had instead used a 95% confidence interval, then the computed margin of error would have been smaller. True False
1.A New York Times/CBS poll asked the question, "What do you think is the most important problem facing this country today?" It found that twenty-four percent of the respondents answered "crime and violence." The margin of sampling error was plus or minus 2.7 percentage points. Following the convention that the margin of error was based on a 95% confidence interval, find the 95% confidence interval for the percentage of the population that would respond "crime and violence" to the question asked by the pollsters. (Express answers as decimal numbers to 3 places.) lower limit upper limit 2.A random sample of medical files is used to estimate the proportion p of all people who have blood type B. (a) If you have no preliminary estimate for p, how many medical files should you include in a random sample in order to be 98% sure that the point estimate p̂ will be within a distance of 0.030 from p?(b) Answer part (a) if you use the preliminary estimate that about 7 out of 90 people…
In an article in the Journal of Advertising, Weinberger and Spotts compare the use of humor in television ads in the United States and the United Kingdom. They found that a substantially greater percentage of U.K. ads use humor.a. Suppose that a random sample of 400 television ads in the United Kingdom reveals that 142 of these ads use humor. Find a point estimate of and a 95 percent confidence interval for the proportion of all U.K. television ads that use humor.b. Suppose a random sample of 500 television ads in the United States reveals that 122 of these ads use humor. Find a point estimate of and a 95 percent confidence interval for the proportion of all U.S. television ads that use humor.c. Do the confidence intervals you computed in parts a and b suggest that a greater percentage of U.K. ads use humor? Explain.
A research group studying cell phone habits asked the question “Do you ever use your cell phone to make a payment at a convenience store?” to people selected from two random samples of cell phone users. One sample consisted of older adults, ages 35 years and older, and the other sample consisted of younger adults, ages 18 years to 34 years. The proportion of people who answered yes in each sample was used to create a 95 percent confidence interval of (0.097,0.125)(0.097,0.125) to estimate the difference (younger minus older) between the population proportions of people who would answer yes to the question. Which of the following is the best description of what is meant by 95 percent confidence? In repeated random sampling with the same sample size, approximately 95% of the sample proportions from the younger group will be between 0.097 and 0.125 greater than the sample proportion from the older group. A In repeated random sampling with the same sample size,…