(5) (a) A study is made to determine the proportion of voters in a sizable community who favor the construction of a chemical plant. If 240 of 800 voters selected at random favor the project and we used p = 240/800 = 0.30 as an estimate of the actual proportion of all votors in the community who favor the project, what can we say with 99% confidence about the maximum error?

(5) (a) A study is made to determine the proportion of voters in a sizable community who favor the construction of a chemical plant. If 240 of 800 voters selected at random favor the project and we used p = 240/800 = 0.30 as an estimate of the actual proportion of all votors in the community who favor the project, what can we say with 99% confidence about the maximum error?

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

A university administrator wishes to know if there is a difference in average time for female and male graduates from Universiti Selangor to get a job after completing a study. Therefore, 17 female and 12 male fresh graduates are surveyed, and the results are summarized in Table 2. At the 5% level of significance, test whether the data provide sufficient evidence to conclude that the average time to get job after graduates for female is longer than male. b. s2 Female 17 3.2 34 Male 12 2.4 44 Table 2 (10 marks)
The Human Resources Director of a central hospital wishes to estimate the mean number of children admitted to the pediatric clinic during a day. The director randomly selects 64 different days and determines the number of admissions for each. Based on this sample, she computes the sample's arithmetic mean X-bar = 19.8 and the sample's variance S2 = 36. You are requested to calculate the sample size that the director should choose if she wishes to estimate the mean number of admissions per day to within ±1 admission with a 95% level of confidence? Note: You can use the sample standard deviation as an estimate for the population standard deviation. A. 97 B. 68 C. 98 D. 139 E. 239
2: If the variance of a national accounting examination is 900, how large a sample is needed to estimatethe true mean score within 5 points with 99% confidence?
A researcher wants to examine different online teaching environments by collecting data on 20 students. Half of the students had synchronous class while the other half had asynchronous class. For the students who had the synchronous class, they scored an average of 80 on the final exam with a sample variance of 10. For the students who had the asynchronous class, they scored an average of 78 on the final exam with a sample variance of 18. Determine if there is a significant difference between the average final exam score between the two groups of students. Use a significance level of 5%. What is the null hypothesis? Group of answer choices: A.) The average final exam score for the asynchronous class is higher than the synchronous class. B.) There is a difference in the average final exam score between the asynchronous class and synchronous class. C.) The average final exam score for the asynchronous class is lower than the synchronous class. D.) There is no difference in the…
In a study comparing banks in two countries, a sample of 142 matched pairs of banks was formed. Each pair contained one bank from country x and one from country y. The pairings were made in such a way that the two members were as similar as possible in regard to such factors as size and age. The ratio of total loans outstanding to total assets was calculated for each of the banks. For this ratio, the sample mean difference (country x - country y) was 0.0579, and the sample standard deviation of the differences was 0.3086. Test, against a two-sided alternative, the null hypothesis that the two population means are equal. (Assume α = 0.01.) Click the icon to view the critical values of the Student's t distribution. The test statistic is t = 2.236. (Round to three decimal places as needed.) The critical value(s) is(are) (Round to three decimal places as needed. Use a comma to separate answers as needed.)
An online store chooses an SRS of 101 customers from its list of all people who have bought something from the store in the last year. It asks those selected how satisfied they are with the store’s website. If it selected two SRSs of 100 customers at the same time, the two samples would give somewhat different results. Is this variation a source of sampling error or of nonsampling error? Explain why. Would the survey’s announced margin of error take this source of error into account.
Separate random samples were collected by a polling agency to investigate the difference in employee satisfaction at non-profit organizations and at for-profit companies. Data collected from 424 employees at non-profit organizations revealed that 373 of them were "highly satisfied." From the for-profit companies, 433 out of 524 employees reported the same level of satisfaction. Researchers want to test if the proportions of satisfied employees are the same at for-profit companies as at non-profit companies. Complete parts a through c below. a) What is the difference in the proportions of the two types of companies? Assume p, is the proportion of satisfied non-profit employees and p, is the proportion satisfied for-profit employees. The difference in the sample proportions, p, -P2, is (Round to three decimal places as needed.) b) What is the value of the Z-statistic? Write the appropriate hypotheses. Let p, be the proportion of satisfied employees from non-profit organizations. Let p,…
If we could not measure the population mean, we could use the sample mean as a point estimator of the population mean. We need to ensure we have random and independent sample measurements True or False
z stat please A survey of 1000 adults from a certain region asked, "If purchasing a used car made certain upgrades or features more affordable, what would be your preferred luxury upgrade?" The results indicated that 58% of the females and 51% of the males answered window tinting. The sample sizes of males and females were not provided. Suppose that of 600 females, 348 reported window tinting as their preferred luxury upgrade of choice, while of 400 males, 204 reported window tinting as their preferred luxury upgrade of choice. Complete parts (a) through (d) below. a. Is there evidence of a difference between males and females in the proportion who said they prefer window tinting as a luxury upgrade at the 0.05 level of significance? State the null and alternative hypotheses, where π1 is the population proportion of females who said they prefer window tinting as a luxury upgrade and π2 is the population proportion of males who said they prefer window tinting…
Provide one sample problem with complete manual solution about Design of Experiments with SEVERAL FACTORS.