Two different simple random samples are drawn from two different populations. The first sample consists of 40 people with 21 having a common attribute. Thesecond sample consists of 1800 people with 1314 of them having the same common attribute. Compare the results from a hypothesis test of p, = P2 (with a 0.05significance level) and a 95% confidence interval estimate of p1 - P2-What is the conclusion based on the hypothesis test?The test statistic isthe critical region, sothe null hypothesis. There isevidence to conclude that p, # p2-The 95% confidence interval is O< (P, -P2) Two different simple random samples are drawn from two different populations. The first sample consists of 40 people with 21 having a common attribute. Thesecond sample consists of 1800 people with 1314 of them having the same common attribute. Compare the results from a hypothesis test of p, = p2 (with a 0.05significance level) and a 95% confidence interval estimate of p1 - P2-What are the null and alternative hypotheses for the hypothesis test?O A. Ho: P1 SP2H1: P1 # P2O B. Ho: P1 = P2H1: P1 > P2OC. Ho: P1 = P2H1: P1

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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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Two different simple random samples are drawn from two different populations. The first sample consists of 30 people with 15 having a common attribute. The second sample dules consists of 1900 people with 1348 of them having the same common attribute. Compare the results from a hypothesis test of p, = p2 (with a 0.01 significance level) and a 99% confidence interval estimate of p, - P2. What are the null and alternative hypotheses for the hypothesis test? O A. Ho: P1 = P2 H1: P1> P2 O D. Ho: P1 SP2 H1: P1 +P2 О В. Но: Ра 3P2 H1: P1
Your company sources motors from two suppliers: supplier A and supplier B. Your application requiresvery high maximum torque. You wish to know if there is a significant difference in maximum torque forthe motors from supplier A vs. supplier B. You sample 10 motors from each supplier and measure themaximum torque. The sample means and sample standard deviations are shown the following table. Is there evidence to conclude that one supplier is better than the other at a 95% confidence level?
Find the value of tn-1, a needed to construct a 95% upper or lower confidence bound with sample size 7. (Round the final answer to three decimal places.)
Independent random samples are taken at a university to compare the average GPA of seniors to the average GPA of sophomores. Given a 90% confidence interval for the difference between the true average GPAs (seniors - sophomores) of (-0.05, 0.78), what can you conclude? Question 8 options: 1) There is no significant difference between the true average GPA for seniors and sophomores. 2) We do not have enough information to make a conclusion. 3) We are 90% confident that the average GPA of seniors is less than the average GPA of sophomores. 4) We are 90% confident that the average GPA of seniors is greater than the average GPA of sophomores. 5) We are 90% confident that the difference between the two sample GPAs falls within the interval.
A sample of 164 was selected from a large population. 66% of the sample had a characteristic of interest. Calculate a 90% confidence interval estimate for the proportion of the population with the characteristic.
Two samples are drawn from populations that are independent of each other. Use this data to test the claim using a confidence interval approach that the means of both populations are the same. Use a significance level of 0.01. Sample A Sample B x¯=46.2 x¯=38.4 s=3.1 s=4.1 n=12 n=16 e) What is the margin of Error? E = f) What is the confidence interval for the difference of the two population means? ? < μ1μ1-μ2μ2< ? g) Based on our confidence interval in f) what is the decision? h) What is the conclusion?
Two different simple random samples are drawn from two different populations. The first sample consists of 20 people with 9 having a common attribute. The second sample consists of 2200 people with 1581 of them having the same common attribute. Compare the results from a hypothesis test of p 1 equalsp 2 (with a 0.05 significance level) and a 95% confidence interval estimate of p 1minusp 2. A. Identify the test statistic. (Round to two decimal places as needed.) B. Identify the critical value(s). (Round to three decimal places as needed. Use a comma to separate answers as needed.) C. The 99% confidence interval is less than left parenthesis p 1 minus p 2 right parenthesis less than (Round to three decimal places as needed.)
Two different simple random samples are drawn from two different populations. The first sample consists of 40 people with 22 having a common attribute. The second sample consists of 1900 people with 1375 of them having the same common attribute.compare results from a hypothesis test of p1-=p2 with a 0.05 significance level and a 95% confidence interval estimate of p1-p2 .
A random sample of ni = 270 people who live in a city were selected and 99 identified as a "dog person." A random sample of n2 = 108 people who live in a rural area were selected and 51 identified as a "dog person." Find the %3D 98% confidence interval for the difference in the proportion of people that live in a city who identify as a "dog person" and the proportion of people that live in a rural area who identify as a "dog person." Round answers to to 4 decimal places. < pi – P2 < -
A study is comparing the taste of instant coffee with fresh-brewed coffee. 50 individuals(random;y sampled) take part in the study. Each individual tastes both kinds of coffee, and declares which kind he or she prefers. The order in which the two kinds of coffee are given to each individual is randomized. 32 individuals in the sample prefer the fresh-brewed coffee. Use a suitable normal approximation to find a 95% confidence interval for the proportion of all individuals who would prefer fresh-brewed coffee. What is the lower limit of this confidence interval?

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