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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10)The superintendent of a golf course believes that the mean score for professional golfers on his course is above 72. He randomly samples the scores of 40 professional golfers from the last tournament. Here are the scores. 69 67 69 71 75 78 70 71 72 74 72 76 69 76 70 77 78 79 72 71 75 75 75 78 71 64 71 68 72 71 73 72 73 71 71 75 72 72 78 75 Construct a 95% confidence interval for the mean score for all professional golfers on this course. (note: ∑xi=∑xi= 2908, ∑x2=∑x2= 211,850)
4. Researchers are interested in the average heart rate of male college students. Assume a random sample of 130 male college students were taken from 200 students for the study. Find a 95% confidence interval for the actual proportion of students.
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 one state, of 927 fatalities, 632 were alcohol-impairing-driving related. Construct the 95% confidence interval of alcohol-impairing-driving related crash proportion of the state.
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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