d. What is the lower bound of the confidence interval?e. What is the upper bound for the confidence interval?f. Interpret the confidence interval you have calculated In the 2018 GSS, a random sample of 1419 adults were asked how many hours per week theyusually spend on email. The mean number of hours spent on email for the sample was 7.15,with a standard deviation of 11.75. Use these data to calculate a 95% confidence interval for themean number of hours spent on email in the population, and answer the following questionsbased on those calculations. d. What is the lower bound of the confidence interval?e. What is the upper bound for the confidence interval?f. Interpret the confidence interval you have calculated

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Answered: d. What is the lower bound of the…

d. What is the lower bound of the confidence interval? e. What is the upper bound for the confidence interval? f. Interpret the confidence interval you have calculated

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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Using an ? = 0.04, a confidence interval for a population proportion is determined to be 0.55 to 0.65. For the same data, if ? is decreased, the confidence interval for the population proportion becomes wider.remains the same. uses a zero margin of error.becomes narrower.
2-C. Construct and interpret a confidence interval to estimate the mean height of the population. You must first write the formula for the confidence interval and then substitute your appropriate numbers. Person 1 Person 2 Person 3 Person 4 Person 5 Person 6 Person 7 Person 8 Person 9 Height (inches) 69 67 67 64 68 69 58 74 70 Shoe Size 10 9.5 10 9 9.5 11 6 11.5 10.5
You are interested in constructing a 95% confidence interval for the proportion of all caterpillars that eventually become butterflies. Of the 409 randomly selected caterpillars observed, 58 lived to become butterflies. Round answers to 4 decimal places where possible. a. With 95% confidence the proportion of all caterpillars that lived to become a butterfly is between _________ and _________. b. If many groups of 409 randomly selected caterpillars were observed, then a different confidence interval would be produced from each group. About _________ percent of these confidence intervals will contain the true population proportion of caterpillars that become butterflies and about ____________ percent will not contain the true population proportion.
Which of the following statements is correct about confidence intervals? A. Higher confidence levels result in narrower confidence intervals. B. Higher confidence levels result in lower standard error of the mean. C. The goal of constructing a confidence interval is to estimate the population mean from the sample mean. D. Both A and C.
Need asap. A magazine article conducted a survey of 1000 people in Washington State and found that 26% of the population believe that Mount Saint Helens will have a repeat erruption this year. In the accompanying dialogue, the article states, we are 90% confident that the true proportion of people in Washington State who believe that Mount Saint Helens will have a repeat erruption this year lies between 23% and 29% . What does 90% represent in the article?A. a confidence intervalB. a confidence levelC. a margin of errorD. a statisticE. a parameter
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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.
Which two of the following could be confidence intervals with the same sample? (0.45, 0.75) (0.4, 0.5) (0.35, 0.45) (0.3, 0.6)
I collect a random sample of size n from a population and from the data collected compute a 90% confidence interval for the mean of the population. Which of the following would produce a wider confidence interval, based on these same data? Use a larger confidence level. Use a smaller confidence level. a b.
Data are used either to test a hypothesis or to construct a confidence interval, but not both. Explain.
What happens to our range when we increase the confidence level?