In a survey, 32 people were asked how much they spent on their child's last birthday gift. The results wereroughly bell-shaped with a mean of $49 and standard deviation of $7. Construct a confidence interval at a 98%confidence level.Please NOTE that the answer here has to be given in the form below sample mean +- margin of error, not theusual final answer bounds.> Next QuestionMacBook Pro@#2$&2367WETYSDGJこの* 00

Given: Sample size n=32 Sample mean xbar=$49 Standard deviations (σ)=$7 To find 98% confidence…

Answered: In a survey, 32 people were asked how…

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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A recent article published by the Wall Street Journal said the Cincinnati airport had the most expensive airfares among the largest airports in the US. While they had some statistics to support this statement, a statistician decided to investigate further. A sample of 46 flights originating in Cincinnati was selected, and the round-trip airfare for each flight was recorded. The sample data is summarized in the StatCrunch output below: With 98% confidence, we estimate the mean airfare for flights out of Cincinnati is between $ and $. (Round the limits of your interval to 4 decimal places.) The mean airfare nationwide was reported as $376 for a round-trip ticket. Does the interval found above support the claim that Cincinnati has airfares which are more expensive than other airports in the US? The interval does not support the claim because the entire interval is not above $376. We can't make this conclusion based on a confidence interval. The interval does not support this claim…
A small business wanted to estimate the mean income from their customers. They took a sample of 256 customers which yielded a sample mean of $71,250 with a standard deviation of $5,800 . What is the 90% confidence interval estimate for the population mean income of their customers.
In a survey, 25 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $45 and standard deviation of $10. Construct a confidence interval at a 98% confidence level.Give your answers to one decimal place.
In a survey, 32 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 $12. Construct a confidence interval at a 95% confidence level.Give your answers to one decimal place.
In a survey, 24 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $36 and standard deviation of $15. Construct a confidence interval at a 90% confidence level.
In a survey, 31 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $47 and standard deviation of $10. Construct a confidence interval at a 95% confidence level. Give your answers to one decimal place.
in a survey, 27 people were asked how much they spent on their child's last birthday gift. the results were roughly bell-shaped with a mean of $30 and sample standard deviation of $20. construct a confidence interval at a 95% confidence level.
In a survey, 20 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $31 and standard deviation of $17. Construct a confidence interval at a 95% confidence level.Give your answers to one decimal place.
In a survey, 17 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $39 and standard deviation of $5. Construct a confidence interval at a 90% confidence level. Give your answers to one decimal place. +
In a survey, 16 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 $13. Construct a confidence interval at a 99% confidence level.Give your answers to one decimal place.
Suppose a 90 percent confidence interval to estimate a population proportion was calculated from a sample proportion of 18 percent and a margin of error of 4 percent. What is the width of the confidence interval?
In a survey, 30 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $30 and standard deviation of $16. Construct a confidence interval at a 99% confidence level.Give your answers to one decimal place.

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