. In a random sample of 400 private high school students, 320 said they brought a smartphone toschool that day, while in a random sample of 400 public high school students, 288 said they broughta smartphone to school that day. Which of the following represents a 98 percent confidence intervalestimate for the difference (private high school minus public high school) between the proportions ofall private high school and public high school students who bring a smartphone to school?(0.8)(0.2) (0.72)(0.28)(A) (0.8-0.72)±1.96,400400(B) (0.8-0.72)±2.054,+(0.8)(0.2) (0.72)(0.28)400400(C) (0.8-0.72)±2.326+(0.8)(0.2) (0.72)(0.28)4004001(D) (0.8-0.72)±2.054, (0.76)(0.24)+400 400(E) (0.8-0.72)±2.326, (0.76)(0.24)+I400 400

The given values are:Number of private high school students (n1) = 400Number of private high school…

Answered: . In a random sample of 400 private…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The figure to the right shows the results of a survey in which 1018 adults from Country A, 1025 adults from Country B, 1005 adults from Country C, 999 adults from Country D, and 999 adults from Country E were asked whether national identity is strongly tied to birthplace. Construct a 95% confidence interval for the population proportion of adults who say national identity is strongly tied to birthplace for each country listed. The 95% confidence interval for the proportion of adults from Country A who say national identity is strongly tied to birthplace is (____),(____) The 95% confidence interval for the proportion of adults from Country B who say national identity is strongly tied to birthplace is (____),(____) The 95% confidence interval for the proportion of adults from Country C who say national identity is strongly tied to birthplace is (____),(____) The 95% confidence interval for the proportion of adults from Country D who say national identity is strongly tied to…
A consumer group reports that a 90% confidence interval for the mean fat content of chicken nuggets from a fast-food restaurant is (14, 18). What is the mean fat content for the sample of 30 chicken nuggets or the point estimate that help make this confidence interval? A. 32 B. 16 C. 2
A researcher surveyed college students in the United States on the typical amount of time each day that they spend interacting with different types of media (television, social media, Internet-connected devices, game consoles, etc.) The researcher found that the mean amount of time that college students spent watching television each day is 135 minutes with a 95% confidence interval of (105, 165). a. State the conclusion the researcher can make from this confidence interval. b. What is the margin of error for the confidence interval?
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