1. Is there a relationship between marital status and happiness? In the 2006 General SocialSurvey, 2985 randomly sampled individuals were asked their level of happiness and maritalstatus. The results are shown in the below Table. Does the sample evidence suggest thatone's happiness depends on one's marital status? Conduct an hypothesis test to answer thisquestion. Use 0.05 level of significance. Write down all necessary steps of the test such ashypotheses, test statistic, P-value, decision, and the conclusion.Marital StatusDivorced/Separated NeverMarriedMarriedWidowedVery HappyHappiness PrettyНаррyNot tooНарру600631121447201423554599351119127

Given: Marital status Married Widowed Divorced Never married Very happy 600 63 112 144…

Answered: 1. Is there a relationship between…

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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Does it pay to take preparatory courses for standardized tests such as the SAT? Using the sample data in the following table, test the claim that the Allan Preparation Course increases the SAT score. Use alpha = .05. Do the data support the effectiveness of the Allan Preparation Course? SAT Before Course: 1005, 1040, 1250, 1300, 1400 SAT After Course: 1095, 1030, 1355, 1410, 1460
A standardized exam consists of three parts: math, writing, and critical reading. Sample data showing the math and writing scores for a sample of 12 students who took the exam follow. Student Math Writing 1 540 474 2 432 380 3 528 457 4 574 612 5 448 420 6 502 520 7 480 430 8 499 459 9 610 615 10 572 535 11 390 329 12 593 613 Use a 0.05 level of significance and test for a difference between the population mean for the math scores and the population mean for the writing scores. (Use math score − writing score.) 1. Calculate the test statistic. (Round your answer to three decimal places.) 2. Calculate the p-value. (Round your answer to four decimal places.) p-value =
Report a Chi-Square test of Independence and use a 5% significance level. Choose the correct P-value picture. [ Select ] ["F", "D", "E", "A", "C", "B"]
Need help, please.
Describe, in your own words, the difference between a one-tailed and two-tailed test within the context of significance testing.
Can you rework this basing the decision onthe P-value corresponding to the observed value of thetest statistic?
State the conclusion for the test. Give reason for your answer.
A writing test is given to incoming freshman at a state university before and after they complete a required class on introductory writing. Scores are between 0 and 50 with a higher score indicating that the student has a more positive attitude toward writing. The test scores for a random sample of 15 freshman before and after they completed the introductory writing course are given below. Conduct a hypothesis test to see whether the writing class helped improve the students’ attitudes about writing. Use a significance level of 0.05. Before 35 5 40 18 25 24 46 20 8 22 47 12 24 3 49 After 37 5 37 19 31 28 48 11 11 25 43 16 20 7 48 Hypothesis test needed
need part A result 270 incorrect.
A study was conducted to determine the proportion of people who dream in black and white instead of color. Among 309 people over the age of 55, 68 dream in black and white, and among 295 people under the age of 25, 15 dream in black and white. Use a 0.05 significance level to test the claim that the proportion of people over 55 who dream in black and white is greater than the proportion for those under 25. identify the test statistic? identify the p value ? 98% confidenc interaval? reject or not to reject and why?
The Bureau of Labor Statistics reports that the official unemployment rate for Black people was 10.4% and 4.7% for White people in February 2015. Select all correct answers for this question. O The samples of white and black people are independent. The explanatory variable is the unemployment rate. The response variable is the unemployment rate. The response variable is race.
Do male and female college students have the same distribution of living arrangements? Use a level of significance of 0.05. Suppose that 87 randomly selected male college students and 95 randomly selected female college students were asked about their living arrangements: dormitory, apartment, or other. The results are shown in Table. Do male and female college students have the same distribution of living arrangements? Dormitory Apartment Other Male 37 45 5 Female 38 37 20 What is the chi-square test-statistic for this data?χ2=

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