We surveyed 40 people in an attempt to determine the proportion of Americans who lease a vehicle. 14said that they did. What is the 92% confidence interval for the proportion of all Americans who lease avehicle? Enter your answers accurate to two decimal places.Can we conclude that the proportion of all Americans who lease a vehicle is more than 0.17?Beyond representative sampling, what assumptions are needed to satisfy the requirements for thisconfidence interval?X - binomial and at least 5 successes and failuresX ~ normal and n > 30binomial, np > 5 and ng > 5X - normal or n > 30

Answered: We surveyed 40 people in an attempt to…

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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In a survey of 74 US females, 56 said they had gone to the dentist within the past year. What is the UPPER endpoint of a 95% confidence interval for the population proportion? What is the LOWER endpoint of a 95% confidence interval for the population proportion?
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You observe 40 customers at a coffee shop, and 77% of them tip. What is the 95% confidence interval for the proportion of customers that tip? Group of answer choices (0.661, 0.879) (0.010, 0.951) (0.703, 0.837) (0.640, 0.900) thanks
We are trying whether, a new low fat diet actually helps obese people lose weight. 100 randomly obese people are assigned to group 1 and put on a low fat-diet. another 100 people are assigned to group 2 and put on a diet of approximately the same amount of food, but not as low in fat. After 4 months, the mean net weight loss was 9.31 pounds for group 1 with a standard deviation of 4.67 pounds, and for group 2 the mean net weight loss was 7.40 pounds with a standard deviation of 4.04 pounds. Is the low-fat diet more effective? Perform a hypothesis test at the 5% significance level a) Define Parameters and state null and alternative hypothesis b) Find test statistics c) Find p-value d) Conclusion
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Question
1- You want to construct a 99% confidence interval for the proportion of retail stores that went out of business due to the recent pandemic. You managed to collect a random sample of 93 retail stores and found 15% of them shut down permanently. Construct and interpret the confidence interval.

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