Suppose that a friend of yours says that they werereading about confidence intervals and ask you thefollowing questions:Part 1When they encountered the symbols pand p. "What'sthe difference between what these symbols represent,and what does that have to do with confidenceintervals?" (make sure you answer both parts of thequestion).Part 2Why do we not usually use 99.99% confidence levelwhen constructing a confidence interval?

We have to answer questions base on confidence interval.

Answered: Suppose that a friend of yours says…

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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We constructed a 95% confidence interval for a population mean. Which of the following would cause the confidence interval to become wider. Select all that apply. This question does not break the honor code and is not graded. Just practice on topics
Elvin wants to know how the school views him as their leader. He asked his friend, Marcus, to research it. After a week, Marcus told him that a sample of 400 schoolmates selected at random indicated that 58% of them hold him in high regard. Determine the confidence interval at 99.5% confidence level.
If we find a 95% confidence interval using a sample, then we can say... 95% of individuals will fall on that interval there is a 5% chance the population proportion is NOT on the interval. 95% of our samples will fall on that interval. No answer text provided.
A new drug to treat high cholesterol is being tested by pharmaceutical company. The cholesterol levels for 27 patients were recorded before administering the drug and after. The 99% confidence interval for the true mean difference in total cholesterol levels (after - before) was (-78.82, -31.18). Which of the following is the appropriate conclusion? Question 4 options: 1) We are 99% confident that the average difference in cholesterol levels is positive, with the higher cholesterol levels being before the drug regimen. 2) We are 99% confident that the average difference in cholesterol levels is positive, with the higher cholesterol levels being after the drug regimen. 3) We are 99% confident that the average difference in cholesterol levels is negative, with the higher cholesterol levels being before the drug regimen. 4) We are 99% confident that the average difference in…
This data comes from the hours of sleep among nightshift and dayshift workers. How would i put into words the meaning of the confidence interval in relation to the topic
How many different ways are there to select a group of 4 out of 8 people for a survey?
Elvin wants to know how the school views him as their leader. He asked his friend, Marcus, to research it. After a week, Marcus told him that a sample of 400 schoolmates selected at random indicated that 58% of them hold him in high regard. Determine the confidence interval at 60% confidence level.
The Athletics Department at a high school is interested in the difference in the run times between 11th and 12th grade students. Suppose the 11th grade students make up the first sample while the 12th grade students make up the second.Using a confidence level of 95%, the confidence interval found was (−1.8,2.9)(-1.8,2.9).Which of the following is the correct interpretation? We are 95% confident that the run times of the 11th grade students are, on average, faster than those of the 12th grade students. We are 95% confident that the run times of the 11th grade students are, on average, slower than those of the 12th grade students. We are 95% confident that the run times of the 11th grade students are, on average, about the same as those of the 12th grade students.
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Part 3: Putting the Pieces Together Some of the following questions might be more challenging, but we want you to wrestle through them and ask for clarification along the way. We hope that, ultimately, working through these problems will strengthen your understanding of the big ideas behind confidence intervals. 10. A researcher plans to survey a random sample of undergraduate students in order estimate the proportion of all undergraduate students who plan to apply to graduate school, and she will construct a confidence interval based on the data she gathers. Which one of the following combinations of sample size and confidence level will result in the most precise confidence interval? A.n= 500, confidence level = 95% B. n = 500, confidence level = 90% c.n= 1000, confidence level = 99% D. n 1000, confidence level = 90% E.n=200, confidence level = 99% 11. What proportion of adults are afraid of spiders? To estimate this unknown population proportion, a researcher gathers a random sample…

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