In order to compare the means of two normal populations with equal variances, independentrandom samples are taken of sizes n = 12 and n2 8. The results from the sample data yield:Sample 1Sample 2sample mean =52 sample mean = 48S1= 1.152 = 2.4To test the null hypothesis Ho: H1 - H2 = 0 versus the alternative hypothesis H, H1- 2 0 at the0.01 level of significance, the most accurate statement isO The value of the test statistic is 5.08 and the critical value is +2.552O The value of the test statistic is 2.8 and the critical value is +2.552O The value of the test statistic is 2.8 and the critical values are -2.552 and +2.552O The value of the test statistic is 5.08 and the critical value is +2,528O The value of the test statistic is 5.08 and the critical value is 2.326

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Answered: To test the null hypothesis Ho: H1-H2=0…

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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Use technology to find the P-value for the hypothesis test described below. The claim is that for a smartphone carrier's data speeds at airports, the mean is u = 15.00 Mbps. The sample size is n = 20 and the test statistic is t= 2.079. P-value = (Round to three decimal places as needed.)
Find the P-value for the indicated hypothesis test with the given standardized test statistics z. Decide whether to reject H0 for the given level of significance α. Left-tailed test, z=-1.32, α=0.10 Right-tailed test, z=2.46, α=0.01 Two-tailed test, z=-1.68, α=0.05
Previously, 11.2% of workers had a travel time to work of more than 60 minutes. An urban economist believes that the percentage has increased since then. She randomly selects 85 workers and finds that 11 of them have a travel time to work that is more than 60 minutes . Test the economist's belief at the a= 0.1 level of significance What are the null and alternative hypotheses? what are the null and alternative hypotheses? Because np0(1-p0)= < ? 10, Find the P-value.
Q3 Test the given claim. Identify the null hypothesis, alternative hypothesis, test statistic, P-value, and then state the conclusion about the null hypothesis, as well as the final conclusion that addresses the original claim. Among 2125 passengers cars in a particular region, 229 had only rear license plates. Among 326 commercial trucks, 47 had only rear license plates. A reasonable hypothesis is that commercial trucks owners violate laws requiring front license plates at a higher rate than owners of passengers cars. Use a 0.01 significance level to test that hypothesis. A. Identity the nulls and alternative hypotheses B. Identify the test statistic ( round to two decimal places as needed) C. Identify the p- values (round to two decimal places as needed ? State the conclusion about the null hypothesis, as well as the final conclusion that addresses the original claim. A. Fail to reject Ho. There is not sufficient evidence to support the claim that commercial trucks owners…
A change is made that should improve student satisfaction with the parking situation at your school. Before the change, 37% of students approve of the parking that's provided. The null hypothesis Ho : p = 0.37 is tested against the alternative H.: p > 0.37 The given hypotheses are incorrect. What are the appropriate hypotheses for performing this significance test? Ho : p = 0.37; Ha :p> 0.37, where p= the true proportion of students that approve of the parking that's provided. Ho : p = 0.37; Ho : p + 0.37, where p= the true proportion of students that approve of the parking that's provided. Ho : p > 0.37; Họ : p = 0.37, where p= the true proportion of students that approve of the parking that's provided. Ho : p = 0.37; H, : p + 0.37, where p the sample proportion of students that approve of the parking that's provided. Ho : p > 0.37; Họ : p = 0.37, where p the sample proportion of students that approve of the parking that's provided.
Use the one-proportion z-test to perform the specified hypothesis test. Use the critical-value approach. x= 345, n = 1000, Ho: p= 0.35, Hạ: p > 0.35, a= 0.01 A. z= - 0.33; critical value =2.575; do not reject Ho B. z=0.62; critical value = 2.33; do not reject Ho C. z= 0.62; critical value =2.575; reject Ho D. z= - 0.33; critical value = 2.33; do not reject Ho
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Previously, 3% of mothers smoked more than 21 cigarettes during their pregnancy. An obstetrician believes that the percentage of mothers who smoke 21 cigarettes or more is less than 3% today. She randomly selects 145 pregnant mothers and finds that 3 of them smoked 21 or more cigarettes during pregnancy. Test the researcher's statement at the a = 0.1 level of significance. What are the null and alternative hypotheses? Họ: P = 0.03 versus H4: p < 0.03 (Type integers or decimals. Do not round.) Because npo (1- Po) =|| 10, the normal model V be used to approximate the P-value. (Round to one decimal place as needed.)
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