3. The following data represents the semi-monthly salary of the faculty (in thousands) offour state universities. Faculties were randomly selected from each school. Is there asignificant difference among the salary of the faculties of the four state universities?Use a 5% level of significance for the test.State UniversityAB151220152019231716181816131016121730ERSITYOTINI'S

Answered: Image /qna-images/answer/396aaa0a-d34e-468c-80bc-5ed5a0f2b67a.jpg

Answered: The following data represents the…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Four mixer trucks, A, B, C, D, are used to move concrete from the batching plant to the construction site. Table Q4 shows the amount of fuel, in litres, used per meter cube of concrete moved for each truck. Test the hypothesis that the mean amount of fuel used per meter cube of concrete moved is the difference for each truck. Use the 5% level of significance. Q4 - END OF QUESTIONS – please asap Table Q4: Amount of fuel, in litres, used per meter cube of concrete for each truck Truck A Truck B Truck C Truck D 0.21 0.21 0.22 0.22 0.25 0.21 0.20 0.18 0.20 0.21 0.21 0.21 0.21 0.18 0.21 0.19 0.20 0.22 0.20 0.18 0.19 0.20 0.19 0.20 0.18 0.23 0.19 0.20
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Suppose researchers want to investigate if experiencing mother nature more often reduces a person's blood pressure. They define the response variable to be blood pressure (systolic), and the explanatory variable to be how many hours, on average, someone spends outdoors each day. A. Could the researchers conduct a randomized experiment to test this? Explain briefly. b. Say an observational study was conducted, and it was found that the people who spend more time outdoors tended to have lower blood pressure. B. Could this be used to conclude that spending time outdoors causes blood pressure to decrease? Explain briefly. C. In a few sentences, discuss why the number of miles (on average) someone jogs each day could be a possible confounder. For questions, 3-6 refer to the MedGPA.txt dataset on the class website. The MCAT (medical college admission test) is a test that is taken by students who want to attend medical school in the USA. The description of each variable in this dataset is as…
Q2: The median age of the children is: 29 30.5 28.5 28
How?
You want to compare the average working time of customer service from two companies. 9 representatives were randomly selected from a insurance company and 20 representatives were randomly selected from an airline company and their working time (in hours) in the past week were recorded. what test would you use? Two-proportions z-test Two-sample t-test One-sample t-test Paired t-test
Claim: Fewer than 91% of adults have a cell phone. In a reputable poll of 1119 adults, 83% said that they have a cell phone. Find the value of the test statistic.
A software company is interested in improving customer satisfaction rate from the 66% currently claimed. The company sponsored a survey of 280 customers and found that 199 customers were satisfied. What is the test statistic z? Ex: 2.22 3
Sixty-three college men were asked what they thought was their ideal weight. A five-number summary of the responses (in pounds) follows. Median 176 Quartiles 155 200 Extremes 122 233 About what percent of the men gave a response that falls in the interval 155 to 176 pounds? % give an exact answer
Scores of 5 students before and after a special coaching program are given as follows. (Check image) At the 5 percent level of significance, does the special coaching benefit students in that students are higher after coaching? Report the p-value for the test.
What is percentile rank of 20?. Please answer correctly.
Based on a sample of 800 people, 48% owned catsThe test statistic is: (to 2 decimals)The p-value is: (to 2 decimals)

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