Suppose you surveyed a sample of 100 in state students at public colleges in PA and a sample of 100 in state students at public colleges in Ohio and found that the average difference in tuition between the 2 groups is $2,982, 95% CIs [$1,769, $4,195]. Based on this confidence interval, would you

Suppose you surveyed a sample of 100 in state students at public colleges in PA and a sample of 100 in state students at public colleges in Ohio and found that the average difference in tuition between the 2 groups is $2,982, 95% CIs [$1,769, $4,195]. Based on this confidence interval, would you

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Refer to the following scenario. An epidemiologist is worried about the prevalence of the flu in East Vancouver and the potential shortage of vaccines for the area. She will need to provide a recommendation for how to allocate the vaccines appropriately across the city. She takes a simple random sample of 331 people living in East Vancouver and finds that 40 have recently had the flu. Suppose that the epidemiologist wants to re-estimate the population proportion and wishes for her 95% confidence interval to have a margin of error no larger than 0.03. How large a sample should she take to achieve this? Sample size =
You are watching a nightly news broadcast on CNN and the reporter says that a 99% confidence interval for the proportion of Americans who supported going to war in Iraq was ( 0.1703 , 0.2427 ). You also note that the footnote says this is based on a random sample performed by Gallup with 833 respondents. What is the correct interpretation of this confidence interval? Question 11 options: 1) We are 99% confident that the proportion of all Americans who supported going to war in Iraq is between 0.1703 and 0.2427. 2) We are 99% confident that of the 833 respondents, between 0.1703 and 0.2427 of them supported the decision to go to war. 3) We are certain that 99% of Americans will be between 0.1703 and 0.2427. 4) We cannot determine the proper interpretation of this interval. 5) We are 99% confident that the proportion of all Americans surveyed who…
A CBS News poll conducted July 29–August 4, 2014, surveyed 1344 randomly selected American adults. Of those surveyed, 726 say that their sympathies in the Middle East situation lie more with the Israelis than with the Palestinians. Give a 95% confidence interval for the proportion of all American adults whose sympathies in the Middle East situation lie more with the Israelis than with the Palestinians. (__Answer 1__, __Answer 2__) Give your answers to 3 decimal places.
In a past presidential election, 37,979,113 people voted for Candidate A 37,758,117 for Candidate B; and 206,521 for third-party candidates. a. What percentage of voters chose Candidate A? b. Would it be appropriate to find a confidence interval of voters choosing Candidate A? Why or why not?
Come up with your own data for a problem that would ask for a 90% confidence interval utilizing Z. Clearly label your variables.
2) A random sample of 120 students at a high school was asked whether they would ask their father or mother for help with a homework assignment in science. A second random sample of 150 different students was asked the same question for an assignment in history. Fifty-four students in the first sample and 72 students in the second sample replied that they turned to their mother rather than their father for help. Construct a 99% confidence interval for the difference of the two proportions and express it as . (Round both numbers to the 4th decimal plac
A genetic experiment with peas resulted in one sample of offspring that consisted of 443 green peas and 167 yellow peas. a. Construct a 95% confidence interval to estimate of the percentage of yellow peas. b. Based on the confidence interval, do the results of the experiment appear to contradict the expectation that 25% of the offspring peas would be yellow?
Example 8.11 For a class project, a political science student at a large university wants to estimate the percent of students who are registered voters. He surveys 500 students and finds that 300 are registered voters. Compute a 90% confidence interval for the true percent of students who are registered voters, and interpret the confidence interval.
Construct a 95% confidence interval for p1 - p2 for a survey that finds 30% of 240 males and 41% of 200 females are opposed to the death penalty. Group of answer choices a.(-0.200, -0.021) b.(-1.532, 1.342) c.(-1.324, 1.512) d.(-0.561, 0.651)
Suppose that in a recent poll, 550 of the 915 randomly selected U.S. adults agreed with the statement “social media sites like Facebook and Twitter do more to divide the country” (as opposed to unite the country, or neither). a. Use this information to construct a 90% confidence interval.
In a survey of 40 students in an introductory statistics class, a professor asks how many states in the United States each student has visited. Using the data from the professor's sample, a 99% confidence interval for the average number of states all students at the professor's school have visited is found to be (6.78, 12.18). Determine whether each of the following statements is valid or invalid. You may assume that the sample is representative of all students at the professor's school. (a) We are 99% confident that the average number of states visited by the 40 students the professor surveyed is between 6.78 and 12.18. Valid Invalid (b) Based on the 99% confidence interval, there is evidence that the average number of states visited by all students at the professor's school is different from 16. Valid Invalid (c) We are 99% confident that the average number of states visited by all students at the professor's school is between 6.78 and 12.18. Valid Invalid (d)…
4. Ten students on a low-fat diet designed to lower their cholesterol and recorded their before and after diet data in the following table: Before diet cholesterol level: After diet cholesterol level: 140 140 220 230 110 120 240 220 200 190 180 150 190 200 360 300 280 300 260 240 Based on a 95% confidence level, after hypothesis testing, what would you tell the students about the diet? Does the null hypothesis reject H0 or fail to reject H0?