A researcher compares the effectiveness of two different instructional methods forteaching anatomy. A sample of 218 students using Method 1 produces a testingaverage of 58.7. A sample of 243 students using Method 2 produces a testing averageof 54.7. Assume that the population standard deviation for Method 1 is 18.63, whilethe population standard deviation for Method 2 is 16.17. Determine the 95%confidence interval for the true difference between testing averages for students usingMethod 1 and students using Method 2.Step 1. Find the point estimate for the true difference between the population means.Answer:_pointsStep 2. Calculate the margin of error of a confidence interval for the difference betweenthe two population means. Round your answer to six decimal places.pointsAnswer:Step 3. Construct the 95% confidence interval. Round your answers to one decimalplace.Answer: Lower endpoint:Upper endpoint:

Answered: Image /qna-images/answer/44e8e64c-8322-4820-a5f9-ba87ee597da1.jpg

Answered: A researcher compares the effectiveness…

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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Mrs. Gallas wanted to estimate the average weight of an Oreo cookie to determine if theaverage weight was less than advertised. She selected a random sample of 30 cookies andfound the weight of each cookie (in grams). The mean weight was = 11.1921 grams with astandard deviation of sx = 0.0817 grams. Make a 95% confidence interval to estimate the truemean weight of an Oreo. 1. What is the formula for calculating the standard deviation of the sampling distribution of x? 2.What condition must be met to use this formula? Has it been met?
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