In a study conducted in March 2020, 144 of 200 randomly selected students said that Liverpool football team were their favourite team.
(a) Construct a 98% confidence interval to estimate the true proportion of students who said that Liverpool football team were their favourite team.
(b) How large a sample would be necessary to estimate the true proportion of with a margin of error of 5%, with 95% confidence?
In a study conducted in March 2020, 144 of 200 randomly selected students said that Liverpool...
Of 380 randomly selected medical students, 30 said that they planned to work in a rural community. Find a 95% confidence interval for the true proportion of all medical students who plan to work in a rural community. What is the Z critical value? What is the margin of error (E)? What is the value of ^p? What is the confidence interval? Round all probabilities to three decimal places.
of 345 randomly selected medical students, 29 said that they planned to work in a rural community. find a 95% confidence interval for the true proportion of all medical students who plan to work in a rural community
A survey of 300 students is selected randomly on a large university campus. They are asked if they usea laptop in class to take notes. Suppose that based on the survey, 135 of the 300 students responded "yes." a) What is the value of the sample proportion p? b) What is the standard error of the sample proportion? c) Construct an approximate 95% confidence interval for the true proportion p by taking 2 SEs from the sample proportion. a) p...
A university dean randomly selected 200 students and found that 102 of them were receiving financial aid. a) Calculate the 80% confidence interval for the true rate of students who receive financial aid. Interpret the result. b) Calculate the 90% confidence interval for the true rate of students who do not receive financial aids. Interpret the result. c) How large a sample size needed with 95% confidence to estimate the true rate of students who receive financial aid within 0.05....
3. large-scale currently h medi study was conducted to estimate the difference in the proportion of male and female adults who ave medical coverage. A sample of 1,200 randomly selected adult males found that 852 currently had cal coverage. An independent sample of 1,400 randomly selected adult females found that 938 currently had coverage. If we let pı represent the proportion of all adult males who currently have medical coverage p> the proportion of all adult females who currently have...
Researchers conducted a study to determine an initial estimate for the effectiveness of the influenza vaccine during the 2014-2015 influenza season (Flannery et al., 2015). The participants in the study were randomly selected from 2321 individuals with respiratory illness from five U.S. states. In Pennsylvania, the study found that, out of 461 patients with acute respiratory illness, 210 had received the influenza vaccine. which procedure should be used for calculating a 95% confidence interval for the vaccinated patients in Pennsylvania,...
A study was conducted to investigate the effectiveness of hypnotism in reducing pain. Results for randomly selected subjects are given in the following table. Use a-0.05 Subjects | A | B | C | D | E | F | G Before6.6 6.5 9.0 10.3 11.3 8.1 6.3 11.6 After 6.8 2.4 7.48.5 8.1 6.1 3.42.0 a) Identify the hypotheses, (Ho and H b) Find the margin of error c) Construct a 95% confidence interval estimate of the mean "before-after"...
11: In a Gallup poll of 1000 randomly selected adults, 347 of them said they were underpaid. Construct a 95% confidence interval estimate of the percentage (proportion) of all adults who say that they are underpaid. Round to the nearest hundredth. 12: If you are using a ? −test when testing a claim about a population mean and the sample size is 53, the number of degrees of freedom is ________.
A survey was conducted with randomly selected 1012 California residents of age 18 and older. One of the questions on the survey was, “Are you in favor of death penalty for a person convicted of murder?” 693 of the surveyed answered yes. Check the conditions and construct 90% confidence interval for proportion of California residents age 18 or older who are in favor of death penalty. (Find critical value, margin of error, confidence interval, and state the conclusion)
1. In an August 2012 Gallup survey of 1,012 randomly selected U.S. adults (age 18 and over), 53% said that they were dissatisfied with the quality of education students receive in kindergarten through grade 12. The bootstrap distribution (based on 5,000 samples) is provided. a). Would it be appropriate to use the normal distribution to construct the confidence interval in this situation? Explain briefly. b). The standard error from the bootstrap distribution is SE = 0.016. Use the normal distribution...