7. In 2005 the New Jersey Adult Tobacco Survey found that 22.5% of 464 blacks surveyed said thatthey smoked cigarettes while 18.3% of 2449 white respondents reported smoking. Construct a90% confidence interval for the difference in the percentage of smokers between black and whiteadults in New Jersey. Does this survey indicate a race-based difference in smoking amongin New Jersey?adults

Answered: Image /qna-images/answer/7877707f-4056-4c27-9935-9d31ca7f4726.jpg

Answered: 7. In 2005 the New Jersey Adult Tobacco…

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 Gallup poll of 1487 adults showed that 43% of the respondents have Facebook pages. Construct a 95% confidence interval for the proportion of adults who have a Facebook page.
In a survey of 1000 households, 800 had cell phones but no landline. Construct a 95% confidence interval for the proportion of all households with a cell phone but no landline.
7) Suppose that in a sample of 5274 customers at a food store, 2468 food shop more than once a week. Find a 98% confidence interval for the population proportion of customers who shop more than once a week. Interpret your answer.
24. Job Interviews In a Harris poll of 514 human resource professionals, 90% said that the appearance of a job applicant is most important for a good first impression. a. Among the 514 human resource professionals who were surveyed, how many of them said that the appearance of a job applicant is most important for a good first impression? b. Construct a 99% confidence interval estimate of the proportion of all human resource professionals believing that the appearance of a job applicant is most important for a good first impression. c. Repeat part (b) using a confidence level of 80%. d. Compare the confidence intervals from parts (b) and (c) and identify the interval that is wider. Why is it wider?
According to a poll, 81% of California adults (410 out of 506 surveyed) feel that education is one of the top issues facing California. We wish to construct a 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?
10. Several years ago, 51% of parents who had children in grades K-12 were satisfied with the quality of education the students receive. A recent poll asked 1,075 parents who have children in grades K-12 if they were satisfied with the quality of education the students receive. Of the 1,075 surveyed, 472 indicated that they were satisfied. Construct a 99% confidence interval to assess whether this represents evidence that parents' attitudes toward the quality of education have changed. What are the null and alternative hypotheses? Ho: p (1) versus H1: p (2) (Round to two decimal places as needed.) Use technology to find the 99% confidence interval. The lower bound is The upper bound is (Round to two decimal places as needed.) What is the correct conclusion? O A. Since the interval contains the proportion stated in the null hypothesis, there is insufficient evidence that parents' att O B. Since the interval contains the proportion stated in the null hypothesis, there is sufficient…
The National Research center conducted a survey of 1000 people to learn about their major international concern. The survey results showed that 760 of the respondents indicated computer cyber attacks is their major international concern. Develop a 94% confidence interval for the population proportion of adults who think computer cyber attacks is their major international concern.
A study was designed to estimate the prevalence of smoking in Harris county. Of 675 people sampled, 522 were non-smokers. What is the 95% Confidence Interval estimate for the prevalence? (74.2%, 80.5%) (19.5%, 25.8%) (.19, .25)
9.

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