Do more than 50% of U.S. adults feel they get enough sleep? According to Gallup's December 2004 Lifestyle poll, 552 of U.S. adults surveyed said that that theyget enough sleep. The poll was based on a random sample of 1003 U.S. adults. Construct and interpret a 95% confidence interval.a. Modelb. Statisticsc. Mechanicsd. InterpretPreviousBIUA ALEXEE 12ptParagraph3Next

Sample size =1003 Number of US adults surveyed said that get enough sleep =552 We have to find the…

Answered: Do more than 50% of U.S. adults feel…

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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The relationship between sample size and the width of a confidence interval may be explained by the concept of ______ . Select one: a. z score b. point estimates c. sampling error d. descriptive statistics
A newspaper reported that 80% of people say that some coffee shops are overpriced. The source of this information was a telephone survey of 100 adults. a. Identify the population of interest in this study. b. Identify the sample for the study. c. Identify the parameter of interest in the study. d. Find and interpret a 90% confidence interval for the parameter of interest. a. Identify the population of interest. Choose the correct answer below. coffee shops a telephone survey 80% of adults newspapers 100 adults adults b. Identify the sample. Choose the correct answer below. adults a telephone survey 100 adults 80% of adults newspapers coffee shops c. Identify the parameter of interest. Choose the correct answer below. A. p, the population proportion of adults who say that some coffee shops are overpriced B. o, the population variance of adults who say that some coffee shops are overpriced С. p, the sample proportion of adults who say that some coffee shops are overpriced D. X, the…
Directions: 1. Answer the following items. 2. Find the appropriate sample size given the confidence level, standard deviation, and margin of error. 3. Round off to the nearest whole number. 4. Just write the number, no other symbols or variables, no spacing or comma. Problem: E = 1 minute, s = 15 minutes, 95% confidence leve
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A study analyzed the sustainability behaviors of CPA corporations. The level of support for corporate sustainability (measured on a quantitative scale ranging from 0 to 160 points) was obtained for each in a sample of 974 senior managers at CPA firms. The CEO of a CPA firm claims that the true mean level of support for sustainability is 71. Complete parts a through e below. i Click the icon to view a printout of the analysis. a. Specify the null and alternative hypotheses for testing this claim. O A. Ho: μ=71 Ha: μ#71 O C. Ho: μ#71 H₂: H=71 O B. Ho: μ = 71 Ha: μ>71 O D. Ho: μ = 71 Ha: μ<71
In a survey, 23 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $42 and standard deviation of $8. Construct a confidence interval at a 98% confidence level. Give your answers to one decimal place. Interpret your confidence interval in the context of this problem.
Report an appropriate hypothesis test for a positive linear relationship and use a 5% significance level. Explain the potential error in words, in context. In the answer options below I have used the phrase “a certain relationship” because I don’t want to give away exactly what type of relationship it is. Group of answer choices We would be accepting that there was a certain relationship between Sale amount and Tip when actually there wasn’t. We would not be accepting that there was a certain relationship between Sale amount and Tip when indeed there wasn’t. We would not be accepting that there was a certain relationship between Sale amount and Tip when actually there was. We would be accepting that there was a certain relationship between Sale amount and Tip when indeed there was.
In a survey, 26 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $40 and standard deviation of $6. Find the margin of error at a 90% confidence level.
The National Association of Colleges and Employers sponsors the Graduating Student and Alumni Survey.Part of the survey gauges student optimism in landing a job after graduation. According to one year’s surveyresults, published in American Demographics, among the 1218 respondents, 733 said that they expecteddifficulty finding a job. Construct a 90% confidence interval for the proportion of students who expecteddifficulty finding a job. Interpret your result.
In a survey, 41 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 $4. Find the margin of error for a 95% confidence level.
Offline Activity: Solve the following. Interpret the resulting data. 1. A consumer watch group interviewed a random sample of 1000 consumers and asked them if they are optimistic about the economy or not. There were 612 who said Yes. Use a 95% confidence level to estimate the population proportions. 2. A nutritionist wants to know the population proportion of Grade 1 learners who eat vegetables. Pegged at a confidence of 95%, a survey among 1200 respondents was conducted and 200 said that they eat vegetables.
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