7. In order to test the effectiveness of a new math course program imposed by Campus Director,the Head of Academic Programs selects ten math students at random to take the course. Thedata show the results of examination before and after the course.Student12345678910Before Exam89828198978590847580After Exam97728099939089878584(a) State the null and alternative hypotheses and use sign test to find aP value relevant to the question of whether the course is effective.(b) Use the sign-test procedure at level nearest 0.90 to find a two-sidedconfidence interval estimate of the median difference in scores(after-before). Give the exact test.

The data is given on the results of the examination before and after the course. Sample size (n) =…

Answered: (a) State the null and alternative…

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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The Woodcock-Johnson Cognitive Ability test indicates that the average score is 95. The same group of 12th grade students (n = 72) in Columbus are tested and the sample mean is 110.1 and the sample standard deviation is 15.2. Do the scores provide good evidence that the mean IQ of this population is greater than 95? State the null (H0) and alternative (Ha) hypotheses. What are the confidence intervals for this data? What is the value of the test statistic? What is the p-value for this data? What is your decision about the null hypothesis? summerize the conclusion in the context
Don't provide handwritten solution.
The data is the grades of 110 randomly selected students of a university course who are registered in the Online version of a course. The grades are out of 100 (A) Construct a 90% confidence interval for u, which is the true average of the grades of all students registered in the online version of the course. Also construct 90% confidence interval to capture p, the true proportion of the Canadians who are willing to pay higher taxes to help limit the climate change? Write down your confidence interval (B) Does the data support the hypothesis that the true mean of grades of the online version is70? Write down your conclusion by comparing the P-value to 0.05. One-Sample Statistics Std. Error Mean Mean Std. Deviation Grade_Section_A 110 70.33 10.945 1.044 One-Sample Test Test Value = 70 95% Confidence Interval of the Mean Difference df Sig. (2-tailed) Difference Lower Upper Grade Section_A 314 109 754 327 -1.74 2.40 One-Sample Effect Sizes 95% Confidence Interval Point Estimate…
Decide whether it describes a confidence interval for a proportion or a confidence interval for a mean. (b) Apply the correct formula to calculate the confidence interval in the format of an estimate + margin of error. During the 2016 season, Mark Williams played in 18 golf matches and used his driver club 126 times, hitting his drives an average of 278 yards per drive, with a standard deviation of 15 yards per drive. Calculate a 95% confidence interval for the distance he was able to hit his driver club in that season.
The data below were collected in a clinical trial to compare a new drug to a placebo for its effectiveness in lowering total serum cholesterol. Generate a 95% confidence interval for the difference in mean total cholesterol levels between treatments. Generate a 95% confidence interval for the proportion of all patients with total cholesterol < 200. New Drug Placebo Total Sample (n=75) (n=75) (n=150) Mean (SD) Total Serum Cholesterol 185.0 (24.5) 204.3 (21.8) 194.7 (23.2) % Patients with Total Cholesterol < 200 78.00% 65.00% 71.50% a. 95% CI ( , )
Can anyone get this right. I've tried multiple answers, but none of them are correct. One picture has the info needed and thr other one contains the actual question for the confidence level. The answer is NOT WHAT'S PICTURED OR 2.547, 6.547
You are trying to study the level of personal net worth of a low income populaon. In parcular you are interested in find the confidence interval of the mean level of net worth (net worth can be posive or negave and is measured in thousands of dollars). You do not know the distribuon of the level of net worth of the populaon. For your study, you collected a sample from 100 persons asking them their level of net worth. The results were such that the sample meanXˉ = 3 and the sample variance Sn2 = 100 (Assume you choose the persons randomly, they report their true net worth, and the populaon is sufficiently large.) From this data, find the 90% confidence interval of the mean level of net worth.(Do not use t distribuon)
Please help for the first one wrong, it wasn’t 4.49
Please help with A and B
State the assumptions for computing a confidence interval on the difference between means?
A flower shop owner wants to estimate the average retail value of the best-selling flower in his inventory. A random sample of 10 flowers indicates an average value of 15 pesos and a standard deviation of 3.5 pesos. What are the point estimate and the 99% confidence interval in the average value of the flower? What is the confidence interval estimate of the problem? a. (11.40 , 18.60) b. (7.29 , 12.71) c. (11.68 , 18.32) d. (7.06 , 12.94)

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