What is the critical value?What is the p-value? A SAT prep course claims to increase student scores by more than 60 points, on average. To testthis claim, 9 students who have previously taken the SAT are randomly chosen to take the prepcourse. Their SAT scores before and after completing the prep course are listed in the followingtable. Test the claim at the 0.01 level of significance.SAT ScoresBefore Prep Course 1010 980 1170 1200 1040 1280 1450 1470 1500After Prep Course1190 1280 1170 1370 1440 1500 1520Difference10 30 201100 126090 28020 80 13090

T test are used to measure the mean significance between the sample and population. It used when the…

Answered: What is the critical value? What is…

Math

Statistics

What is the critical value? What is the p-value?

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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A study of patients with stage 1 breast cancer is run to assess time to progression to stage II over an observation period of 15 years. Of interest is whether there is a difference in time to progression between patients on two different chemotherapy regimens. Times to progression are measured in years from the time at which the chemotherapy regimen was initiated. (using Excel and show the table) A) Estimate the survival functions (times to progression) for each chemotherapy regimen using the Kaplan-Meier approach. B) Sketch the two survival functions above. C) Test whether there is a significant difference in time to progression between treatment regimens using the log-rank test and a 5% level of significance. D) Compute and interpret the hazard ratio for progression to stage II with the regimen I as compared to regimen 2. Years to progression by chemotherapy regimen Regimen 11 Progression No progression 12 14 13 11 15 10 8 2 6 7 3 4 6 12 Regimen 2 Progression No progression 9 11 4 14…
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Ankylosing spondylitis is an inflammatory disease which affects the spine and sacroiliac joint and can lead to the fusing of vertebrae in the spine. Exercise is important in helping manage pain, therefore a pharmaceutical company wanted to test if their new biologic would increase the time a patient could exercise before experiencing discomfort. The following table gives the time (in minutes) seven patients were able to exercise before reporting pain, both at baseline and then again after six months of taking the biologic.Exercise Time (in minutes)Subject 1 Baseline 30 Post-treatment 40Subject 245 40Subject 350 60Subject 435 37Subject 555 60Subject 620 25Subject 775 75Assume the population(s) of all exercise times is (are) normally distributed. Use JMP to test whether the evidence suggests that the time a person with ankylosing spondylitis can exercise before experiencing discomfort increases after taking this new biologic. Validate the test statistic from JMP by computing it manually.…
A poll shows 60% of voters support choice A out of 25 voters. Someone else claims the actual support is 50%. What is the critical value?
PLE collects a variety of data from special studies, many of which are related to the quality of its products. The company collects data about functional test performance of its mowers after assembly; results from the past 30 days are given in the worksheet Mower Test. In addition, many in-process measurements are taken to ensure that manufacturing processes remain in control and can produce according to design specifications. The worksheet Blade Weight shows 350 measurements of blade weights taken from the manufacturing process that produces mower blades during the most recent shift. Elizabeth Burke has asked you to study these data from an analytics perspective. Drawing upon your experience, you have developed a number of questions: For the mower test data, what distribution might be appropriate to model the failure of an individual mower? What fraction of mowers fails the functional performance test using all the mower test data? What is the probability of having x failures in the…
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A medical researcher says that less than 81% of adults in a certain country think that healthy children should be required to be vaccinated. In a random sample of 200 adults in that country, 79% think that healthy children should be required to be vaccinated. At a = 0.05, is there enough evidence to support the researcher's claim? Complete parts (a) through (e) below. (a) Identify the claim and state Ho and H Identify the claim in this scenario. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do not round.) O A. % of adults in the country think that healthy children should be required to be vaccinated. O B. The percentage of adults in the country who think that healthy children should be required to be vaccinated is not % O C. More than % of adults in the country think that healthy children should be required to be vaccinated. OD. Less than % of adults in the country think that healthy children should be required to be…