A random sample of 1026 adults in a certain large country was asked "Do you pretty much thinktelevisions are a necessity or a luxury you could do without?" Of the 1026 adults surveyed, 533indicated that televisions are a luxury they could do without. Complete parts (a) through (e)below.(a) Obtain a point estimate for the population proportion of adults in the country who believe thattelevisions are a luxury they could do without.Ap=(Round to three decimal places as needed.)

sample size (n)=1026 The number of adults indicated that televisions are luxury they could do…

Answered: A random sample of 1026 adults in a…

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 programmer plans to develop a new software system. In planning for the operating system that he will use, he needs to estimate the percentage of computers that use a new operating system. How many computers must be surveyed in order to be 95% confident that his estimate is in error by no more than five percentage points? Complete parts (a) through (c) below. a) Assume that nothing is known about the percentage of computers with new operating systems. n=0.250.25 (Round up to the nearest integer.) b) Assume that a recent survey suggests that about 99% of computers use a new operating system. n=nothing (Round up to the nearest integer.) c) Does the additional survey information from part (b) have much of an effect on the sample size that is required? A. No, using the additional survey information from part (b) does not change the sample size. B. No, using the additional survey information from part (b) only slightly increases the sample…
How many computers must be surveyed in order to be 99%confident that his estimate is in error by no more than two percentage points?
The accompanying table gives the number of men 65 years or older in the United States and the percentage of men age 65 or older living below the poverty level. Men 65 years or older, m Percentage below poverty level, p (millions) 8.3 Year m(x) 1970 1980 1985 1990 1997 2000 10.3 = 11.0 12.6 14.0 14.4 million is the number of ---Select--- 20.2 11.1 (a) Using time as the input, fill in the blanks to complete a linear model for the data set for the number men 65 years or older in the United States. (Let x be the years since 1970. Round all numerical values to three decimal places.) 1(x) = m(x) • p(x)/ 100 million men. 8.7 7.8 million men per year million men per year 7.0 7.5 Using time as the input, fill in the blanks to complete a quadratic model for the data set for the percentage of men age 65 or older below poverty level. (Let x be the years since 1970. Round all numerical values to three decimal places.) p(x) % is the percentage of ---Select--- where x is ---Select--- I The total…
Need help with the attached.
A survey is conducted from a population of people of whom 40% have a college degree. The following sample data were recorded for a question asked of each person sampled, "Do you have a college degree?" Complete parts a and b. No Yes No Yes No No Yes No No No Yes No No No No Yes No No Yes No No Yes No No a. Calculate the sample proportion of respondents who have a college degree. The sample proportion of respondents who have a college degree is (Type an integer or a decimal.) 22: No No Yes No No Yes
(3) Look at the boxplot below, which shows data for the selling price of homes in acertain neighborhood.a. What was the typical selling price? (This should be one number.)b. The cheapest 25% of homes sold for what range of prices? (This should be a rangeof values.) c. The middle 50% of homes sold for what range of prices? (Again, this should be arange of values.)
Claim: Fewer than 97% of adults have a cell phone. In a reputable poll of 1042 adults, 92% said that they have a cell phone. Find the value of the test statistic. .... . The value of the test statistic is (Round to two decimal places as needed.)
Determine whether the study is an experiment or an observational study, and then identify a major problem with the study. In a survey, 1465 Internet users chose to respond to this question posted on a newspaper's electronic edition: "Is news online as satisfying as print and TV news?" 52% of the respondents said "yes." This is an ________________observational study experiment because the researchers________________________ apply a treatment to do not attempt to modify the individuals. What is a major problem with the study? A. The sample is not very large. B. There is no blinding or replication, which has a high chance of leading to bias. C. The results apply only to Internet users. D. This is a convenience sample with voluntary response, which has a high chance of leading to bias.
Ideal Number of Children Frequency 0. 11 27 528 262 4 63 10 9. 8. 6. 0. 10 1 11 /23 456
Vegetarians are much less common in the United States than in the rest of the world. In a 2018 survey of 11,000 people in the United States, VeganBits found 55 who are vegetarians. a. Develop a point estimate of the proportion of people in the United States who are vegetarians (to 3 decimals). b. Set up a hypothesis test so that the rejection of Ho will allow you to conclude that the proportion of people in the United States who are vegetarians exceeds 0.004. Но: р - Select your answer - Ha: P - Select your answer - c. Conduct your hypothesis test using a = = 0.05. p-value: What is your conclusion? p-value is Select your answer - so - Select your answer - v Họ. We - Select your answer - v that the proportion of people in the U.S. who are vegetarians exceeds 0.004. Hint(s) Check My Work
Childhood obesity: A national health survey weighed a sample of 535 boys aged 6 - 11 and found that 83 of them were overweight. They weighed a sample of 474 girls aged 6 - 11 and found that 70 of them were overweight. Can you conclude that the proportion of boys who are overweight is greater than the proportion of girls who are overweight? Let p1 denote the proportion of boys who are overweight and let p2 denote the proportion of girls who are overweight. Use the =α0.05 level of significance and the critical value method with the table. (a) State the appropriate null and alternate hypotheses. (b) Compute the value of the test statistic. (c) State a conclusion at the =α0.05 level of significance.
Researchers wondered if there was a difference between males and females in regard to some common annoyances. They asked a random sample of males and females, the following question: "Are you annoyed by people who repeatedly check their mobile phones while having an in-person conversation?" Among the 590 males surveyed, 219 responded "Yes"; among the 532 females surveyed, 217 responded "Yes." Does the evidence suggest a higher proportion of females are annoyed by this behavior? Complete parts (a) through (g) below. (a) Determine the sample proportion for each sample. The proportions of the females and males who took the survey who are annoyed by the behavior in question are and , respectively. (Round to four decimal places as needed.)

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