We calculate a confidence interval. Then we gather additional data and find a new confidence interval. What happens to the margin of error if the sample size increased but the standard deviation and confidence stay the same? Explain your reasoning. If the sample size is increase

We calculate a confidence interval. Then we gather additional data and find a new confidence interval. What happens to the margin of error if the sample size increased but the standard deviation and confidence stay the same? Explain your reasoning. If the sample size is increase

Name: We calculate a confidence interval. Then we gatheradditional data and
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Description: We calculate a confidence interval. Then we gatheradditional data and find a new confidence interval.What happens to the margin of error if the sample size isincreased but the standard deviation and confidence levelstay the same? Explain your reason

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Tina catches a 14-pound bass. She does not know the population mean or standard deviation. So she takes a sample of five friends and they say the last bass they caught was 9, 12, 13, 10, and 10 pounds. Find the t and calculate a 95% (α = .05) confidence interval.
Please explain. In a survey, 11 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $41 and standard deviation of $4. Find the margin of error at a 90% confidence level.Give your answer to two decimal places.
They are both the same question. Just giving you the answer choices along with the interval.
Part 2 please
You were interested in how long the average psychology major at your college studies per night, so you asked 10 psychology majors to tell you the amount they study. They told you the following times: 2, 1.5, 3, 2, 3.5, 1, 0.5, 3, 2, 4. (a) Find the 95% confidence interval on the population mean. (b) Find the 90% confidence interval on the population mean.
Explain also how you use Z table ..
Please help with question 5 a-b
Please answer all questions in detail
If you increase the confidence level, the confidence interval ________________. A.stays the same B.decreases C.may increase or decrease, depending on the sample data D.increases
#10 please
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…