Let n₁ = 50, X₁ = 40, n₂ = 50, and X₂ = 20. Complete parts (a) and (b) below. Determine a conclusion. Choose the correct answer below.the null hypothesis. There isdifference between the two population proportions.evidence to support the claim that there is a significantb. Construct a 95% confidence interval estimate of the difference between the two population proportions.П5П1-П25(Type integers or decimals. Round to four decimal places as needed.)

That is, there is no evidence to conclude that there is significant difference between the two…

Answered: Determine a conclusion. Choose the…

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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Also answer : find the z-test statistic . Select the correct choice below and if necessary fill in the answer box to complete your choice . z=? Or the test can't be performed . what is the result of the test ? 1. Fail to reject . The data provide sufficient evidence to suppose the claim 2. fail to reject. The data do. It provide sufficient evidence to support the claim 3. reject . The data provide sufficient evidence to support the claim 4. reject . The data do not provide sufficient evidence to support the claim 5. the test can't be performed
A college entrance exam company determined that a score of 25 on the mathematics portion of the exam suggests that a student is ready for college-level mathematics. To achieve this goal, the company recommends that students take a core curriculum of math courses in high school. Suppose a random sample of 200 students who completed this core set of courses results in a mean math score of 25.5 on the college entrance exam with a standard deviation of 3.9. Do these results suggest that students who complete the core curriculum are ready for college-level mathematics? That is, are they scoring above 25 on the math portion of the exam? Complete parts a) through d) below. a) State the appropriate null and alternative hypotheses. Fill in the correct answers below. The appropriate null and alternative hypotheses are H,: versus H,: b) Verify that the requirements to perform the test using the t-distribution are satisfied. Check all that apply. O A. The students' test scores were independent of…
Which of the following confidence intervals would have a wider width for the same set of data? A 90% interval. A 99% interval. O The 90% interval. O The 99% interval.
Write your complete solutions. The final test and exam averages for 20 randomly selected students taking a course in engineering statistics and a course in operations research are in the table below. Assume that the final averages are jointly normally distributed. d) Test the hypothesis that p = 0, using a = 0.05. e) Test the hypothesis that p = 0.5, using a = 0.05. equations on this slide to answer the question) f) Construct a 95% confidence interval for the correlation coefficient. Statistics OR Statistics OR Statistics OR 86 80 86 81 83 81 75 81 71 76 75 70 69 75 65 72 71 73 75 81 84 85 76 72 90 92 71 72 84 80 94 95 62 65 97 98 83 80 90 93
Construct an 80% confidence interval estimate for the population mean given the values below. x=300 o=47 n = 252 The 80% confidence interval for the population mean is from 4 to 4. (Round to two decimal places as needed. Use ascending order.)
The narrower the confidence interval, the more precise it is. Which combination of factors will produce the most precise estimate of the difference between two population means? a. two samples of n = 20 and 90% confidence b. two samples of n = 50 and 80% confidence c. two samples of n = 50 and 90% confidence d. two samples of n = 20 and 80% confidence
Short answer
B. Find the confidence intervals for the population mean from the given information. 3. X = 28, 4. X = 50, 5. X = 75, 6..X = 15.3, n=60, = 10, n = 16, n = 58, S = = 4 Confidence Level: 90% %3D s = 4.2 Confidence Level: 95% 0 = 10 Confidence Level: 99% o = 16 Confidence Level: 95% 11.
Census data for a certain county show that 17% of the adult residents are Hispanic. Suppose 74 people are called for jury duty and only 10 of them are Hispanic. Does this apparent underrepresentation of Hispanics call into question the fairness of the jury selection system? Explain. Write appropriate hypotheses. Ho: p= 17% HA: P < 17% The test statistic is z = (Round to two decimal places as needed.)
Construct a 99% confidence interval estimate for the population mean given the values below. x= 260 o= 64 n= 240 The 99% confidence interval for the population mean is from (Round to two decimal places as needed. Use ascending order.) to
Construct a 90% confidence interval estimate for the population mean given the values below. x = 290 o=54 n = 240 The 90% confidence interval for the population mean is from to (Round to two decimal places as needed. Use ascending order.)
Describe type I and type II errors for a hypothesis test of the indicated claim. A clothing store claims that at least 80% of its new customers will return to buy their next article of clothing. Describe the type I error. Choose the correct answer below. OA. A type I error will occur when the actual proportion of new customers who return buy their next article of clothing is at least 0.80, but you reject Ho: p20.80. OB. A type I error will occur when the actual proportion of new customers who return to buy their next article of clothing is at least 0.80, but you fail to reject Ho: p20.80. OC. A type I error will occur when the actual proportion of new customers who return article of clothing is no more than 0.80, but you fail to reject Ho: p≤0.80. OD. A type I error will occur when the actual proportion of new customers who return article of clothing is no more than 0.80, but you reject Ho: p≤0.80. buy their next buy their next

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