9. A student researcher is assigned the task of finding outif the level of education attained by a person dependedon the income class to which he/she belonged. Heinterviews 60 persons. The results are recorded on thetable below.Level ofIncome BracketEducationAвAttainedHighSchool15GraduateCollege GraduateWith MA/PhDDegrees210345.The student applies a test of independence at 5%level. What is his conclusion?

Answered: Image /qna-images/answer/e52d2e1c-61b4-4a0a-a5ed-0e5d310ed460.jpg

Answered: 9. A student researcher is assigned 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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please show working out. Thank you A University has put in place a 4 week course of lunchtime exercise breaks for its staff to see if its employees’ job satisfaction can be improved. To measure the effectiveness of this program, 10 randomly selected staff in the program were surveyed about their feelings at work, once at the start of the program and again after the course. Higher scores indicate higher satisfaction. The job satisfaction index results for this group were: Staff 1 2 3 4 5 6 7 8 9 10 Before 34 28 29 45 26 27 24 15 15 27 After 33 31 36 46 32 34 28 26 19 37 Use a test of significance at 5% level to decide if the program has improved the employee’s job satisfaction on average. Show your graphical evidence, if needed, and clear conclusion. - please sketch the curve as well. thank you
JUST NEED THE ANSWER PLEASE WRITE IT AS "ANSWER=....."
12. Dr. Pat Jones is an industrial psychologist and is currently studying stress amount internet company executives. A questionnaire was developed to measure stress. A score above 80 indicates stress at a dangerous level. A random sample of 15 executives revealed the stress scores in the attached file. homework 3 - 2.xlsx ( Stress 94, 78, 83, 90, 78, 99, 97, 90, 97, 90, 93, 94, 100, 75, 84 ) What is the point estimate of the population mean? (answer should be in xx.xxx format)
True or False: A professor computed the sample average exam score of 20 students and used it to estimate the average exam score of the 1,500 students taking the exam was an example of inferential statistics. Select one: True False
find p value and its meaning 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…
24
Does the type of instruction in a college statistics class (either lecture or self-paced) influence students’ performance, as measured by the number of quizzes successfully completed during the semester? Twelve students were recruited for the study. Students received the lecture instruction or a self-paced instruction. The total number of quizzes completed during teach type of instruction appear below.
2. A test has a maximum possible score of 200. The results achieved by a class of 20 students are listed: 168, 152, 112, 88, 95, 123, 177, 166, 145, 104, 112, 156, 110, 141, 177, 166, 134, 190, 111, and 120. a) Determine the mean, median, and mode. b) What are the quartiles for this data set? c) Jacquelin's mark is in the 40th percentile for this group. Explain what the percentile means. What is Jacquelin's mark? (4

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