18192425QUESTION 26A researcher is interested in whether an alternative treatment, "Attention Focus Formula", effectively reduces Attention Deficit Disorder (ADD). The researcher hasaccess to 10 children who have all been diagnosed with ADD. He places them on a regimen of "Attention Focus Formula" for a period of six weeks. Afterwards, hegives the children the "Attention Deficit Disorders Evaluation Scale" (ADDES), which is a 43-item test. Population scores on the ADDES are known to have astandard deviation of 12 and a score of 30 is average for children who have a clinical level of ADD. The following ADDES scores were obtained fromthe 10 children after being given Attention Focus for six weeks. The researcher wants to know if Attention focus Formula was effective in reducing ADD. (usealpha=0.05)Child#13.8.6.10%3D11%3D111111%3DADDES score24212829252228IиПаWhich of the following is the correct answer for Step 1 of the hypothesis test?O Ho : u= 30H1 : u> 30O Ho= 30Hl : µ<30OHo:= 26.3Hl : u<26.3OHo : H= 30H1 : u#30Save All AnswersClick Save and Submit to save and submit. Click Save All Answers to save all answers.3130252.13%3D

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Answered: 1819 24 25 QUESTION 26 A researcher is…

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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wants to know if it is better for Instructor Pilots to give flight students feedback in the airplane immediately after each maneuver rather than to wait till they are on the ground and debriefing. Six student pilots are selected. Each student receives immediate feedback on half of their flights and receives delayed (after landing) feedback on the other half of their flights. Average scores for the student’s evaluations are listed in the table below. Show work. Student Pilot Score for Immediate Feedback Score for Feedback Received After on the Ground Student Pilot A 4 2 Student Pilot B 3 4 Student Pilot C 5 2 Student Pilot D 3 3 Student Pilot E 5 3 Student Pilot F 5 2 a. Test the hypothesis that the student pilots receive higher evaluations on flights where they received immediate feedback compared to delayed (after landing) feedback. Use α =.05. Use the four steps of hypothesis testing. b. Calculate Omega squared (ώ2)
ENGINEERING PROBABILITY AND STATISTICS 1. Find a simple research problem with ready dataset from public available domain databases (just like the examples discussed in SPSS ANOVA practice). Dataset source suggestions: 2. Perform statistical analysis (descriptive+inferential). The goal is to retrieve statistical knowledge from the dataset. You can use SPSS/PSPP/EXCEL software 3. Write up a short report (10-25 pages) to discuss the purpose of the study, what statistical methods (tests) used and results obtained. REPORT FORMAT 1. Introduction 2. Literature Review 3. Methodology 4. Results and Discussion 5. Conclusion
Aspirin III: Decision and Conclusion Regarding the experiment in the data frame Aspirin from the abd package, the researchers wanted to know whether or not taking aspirin affects one's risk of developing cancer. Recall that they defined their parameters as follows: p1 = the proportion of ALL individuals who would develop cancer, if all of them were to take aspirin like the subjects in the Aspirin group did. p2 = the proportion of ALL individuals who would develop cancer, if all of them were to take a placebo, like the subjects in the placebo group did. They ran the code for a two-sided significance test and got the following results: ## ## ## Inferential Procedures for the Difference of Two Proportions p1-p2:## cancer grouped by treatment ## ## ## Descriptive Results:## ## yes n estimated.prop## Aspirin 1438 19934 0.07214## Placebo 1427 19942 0.07156## ## ## Inferential Results:## ## Estimate of p1-p2: 0.0005805 ## SE(p1.hat - p2.hat): 0.002586 ## ##…
5 3 8 Time can be expressed on different levels of scale, including days, weeks, months, and years. Can the scale provided influence perception of time? For example, if you an order over the phone, would it make a difference if you were told the package would arrive in four weeks or in one month? To investigate this, two researchers asked a group of 267 college students to imagine that their car needed major repairs and would have to stay at the shop. Depending on the group they were randomized to, the student was either told it would take 1 month or 30/31 days. Each student was then asked to give best- and worst-case estimates of when the car would be ready. The interval between these two estimates (in days) was the response. Here are the results: T Group 30/31 days S 14.3 13.9 n 20.4 177 90 1 month 24.8 Suppose you want to construct a 95% confidence interval for the difference in populations means (30/31 days minus 1 month). What would be the upper limit of the 95% confidence…
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JOB x LIFE SATISF, PART 5 of 6. What is the observed F score value for these scores? A researcher is interested in the effect of employment on life satisfaction. He selects a random sample of 12 adults who are employed full time, employed part time, temporarily unemployed, or chronically unemployed. He provided a scale that assessed their life satisfaction on a scale that ranges from 0 (very dissatisfied) to 80 (very satisfied). His results are as follows: What is the observed F score value for these scores?
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Quality Progress, February 2005, reports on improvements in customer satisfaction and loyalty made by Bank of America. A key measure of customer satisfaction is the response (on a scale from 1 to 10) to the question: "Considering all the business you do with Bank of America, what is your overall satisfaction with Bank of America?" Here, a response of 9 or 10 represents "customer delight." Suppose that the survey selected 480 customers. Assume that 45% of Bank of America customers would currently express customer delight. That is, assume p= .45. (a) Find the probability that the sample proportion obtained from the sample of 480 Bank of America customers would be within three percentage points of the population proportion. That is, find P(.42 ≤ § ≤ .48). (Round your answer to 4 decimal places. Do not round intermediate values. Round z-value to 2 decimal places.) P(0.42 ≤ (p-hat) ≤ 0.48)

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