19A 95% confidence interval for the mean starting wage of welders in Georgia is foundto be $19.60 to $23.12 per hour.A person claims that the mean starting wage of electricians in a specific region is$23.According to the confidence interval which of the following is the best response?We believe that $23 is almost for sure the correct population mean wage.We agree that 99% of all welders in Georgia probably have a starting wage of$23 per hour.We believe that $23 is not a plausible value for the mean wage.We can't dispute the claim that the mean wage is $23 but we do not believe thewage is exactly $23 either because there are a lot of other values in the intervaltoo.

Confidence interval:In Statistics, a confidence interval is a kind of interval calculation, obtained…

Answered: A 95% confidence interval for the mean…

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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Similar questions

If X̅ = 65, ? = 20 ??? ? = 36, construct a 95% confidence interval estimate for the population mean, ?.
In a survey, 23 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $42 and standard deviation of $8. Construct a confidence interval at a 98% confidence level. Give your answers to one decimal place. Interpret your confidence interval in the context of this problem.
When a population has less variability, for the same margin of error and confidence level, the confidence interval becomes a. larger b. smaller c. of unchanged size
9. A researcher wants to construct a 99% confidence interval for the proportion of Americans who think that the U.S. invading Iraq was an effective step in combating world terrorism. She has no initial idea of what that proportion is. How large should her sample size be if she wants the margin of error to be at most two percent? Show or explain your thinking.
Thelma and Louise are each attempting to estimate the proportion of adults who enjoy listening to country music. They each survey a different random sample of adults, and in each sample, the proportion who say they enjoy listening to country music is 0.29. Thelma and Louise each use their sample data to construct a confidence interval. Thelma's interval is from 0.242 to 0.338 and Louise's interval is from 0.237 to 0.323. One of these intervals was computed correctly and the other was not. Which interval must be the correct one? It's impossible to answer this question without knowing the level of confidence used for each interval. It's impossible to answer this question without knowing the sample sizes. O It's impossible to answer this question without knowing the sample sizes or the level of confidence used for each interval. Thelma's interval must be the correct interval. O Louise's interval must be the correct interval.
In a survey, 10 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $46 and standard deviation of $8. Construct a confidence interval at a 99% confidence level.Give your answers to one decimal place.
if n = 42, p = 0.6 then construct the 98% confidence interval for the population proportion.
In a survey, 18 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 $7. Construct a confidence interval at a 80% confidence level. Give your answers to one decimal place. Interpret your confidence interval in the context of this problem.
9. According to a poll, eighty seven percent (87%) of California adults (440 out of 506 surveyed) feel that education is one of the top issues facing California. We wish to construct a ninety percent (90%) confidence interval for the true proportion of California adults who feel that education is one of the top issues facing California.What is a point estimate for the true population proportion?
In a survey, 19 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $49 and standard deviation of $2. Construct a confidence interval at a 99% confidence level. Give your answers to one decimal place. Interpret your confidence interval in the context of this problem.
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