You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estimation for the population proportion. You would like to be 80% confident that you estimate is within 5% of the true population proportion. How large of a sample size is required? Hint: Video [+] n =

You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estimation for the population proportion. You would like to be 80% confident that you estimate is within 5% of the true population proportion. How large of a sample size is required? Hint: Video [+] n =

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

The personnel director of the Target Corporation wants to estimate the number of employees within one year of retirement. A simple random sample of 80 employees' records is selected, and four people are found to be within one year of retirement. Formulate a 98% interval estimate for the true proportion of employees within one year of retirement in the entire corporation.
We need to estimate the average tv usage of households in 1 week. How many houses should we randomly select to be 95% confident that the sample mean is within 20 minutes of the population mean? Assume that a previous survey has shown σ = 92 minutes. Show work please
A study is to be made to estimate the proportion of residents of a certain city and its suburbs who favor the construction of a nuclear power plant near the city. How large a sample is needed if one wishes to be at least 90% confident that the estimate is within 0.02 of the true proportion of residents who favor the construction of the nuclear power plant?
A study is to be made to estimate the proportion of residents of a certain city and its suburbs who favor the construction of a nuclear power plant near the city. How large a sample is needed if one wishes to be at least 90% confident that the estimate is within 0.03 of the true proportion of residents who favor the construction of the nuclear power plant?
An auditor decided to use systematic sampling to select a sample from the 6,000 expense reimbursement forms sent to HR. What is the maximum size of the sample she can obtain if she selects every 30th expense form, submitted in chronological order? Maximum sample size:
An aerial survey of 4 plots were select by a SRS. The number of animals detected were 44, 55, 5, and 16. Careful examination of the photos of the first and third of the plots (selected by simple random subsample) revealed the actual presence of of 56 and 6 animals, respectively. The study area consist of 10 plots. Please estimate the total number of animals in the study by using ratio estimator, and find the standard error of the estimate.
According to statistics reported on CNBC, a surprising number of motor vehicles are not covered by insurance. Sample results, consistent with the CNBC report, showed 33 of 218 vehicles were not covered by insurance. a. What is the point estimate of the proportion of vehicles not covered by insurance (to 4 decimals)? b. Develop a 95%interval for the population proportion (to 4 decimals).
Please strictly handwritten (sample computation in the photo attached)
Show All Work: In a sample of 350 respondents who identify as either a case manager or a clinician, case managers account for two-thirds of all observations in the sample. What is the total number of clinicians in the sample?
a. An investigator decided to conduct a research to describe the average number of females in each family. Considering the case of families in the town. Describe what may contribute to the difference between the value of the sample statistics and its corresponding population parameter.b. How would the investigator control the above-mentioned phenomenon? PLEASE ANSWER THE b part only if possible
The state education commission wants to estimate the fraction of tenth grade students that have reading skills at or below the eighth grade level. Step 1 of 2: Suppose a sample of 292 tenth graders is drawn. Of the students sampled, 240 read above the eighth grade level. Using the data, estimate the proportion of tenth graders reading at or below the eighth grade level. Enter your answer as a fraction or a decimal number rounded to three decimal places.
Data from a representative sample were used to estimate that 33% of all computer users in a recent year had tried to get on a Wi-Fi network that was not their own in order to save money. You decide to conduct a survey to estimate this proportion for the current year. What is the required sample size if you want to estimate this proportion with a margin of error of 0.04? Calculate the required sample size first using 0.33 as a preliminary estimate of p. (Round your answer up to the nearest integer.) The sample size of _____ should be used for this study because it will guarantee a margin of error of no greater than 0.04. The other sample size computed will only guarantee a margin of error no greater than 0.04 if p < _____ or if p > ______ .