In the past, students in a particular course have achieved a mean Xmas exam score of 72.6, with a standard deviation of 12.5. This year, 15 students in one section achieved a mean Xmas exam score of 72.2, while 10 students in another section achieved a mean Xmas exam score of 77.3. Is the overall (grand) mean of the 25 students in this year's two sections significantly different from the mean obtained in previous years (α ≤ .05)? Answer: 2. Z = 0.656, do not reject Ho: there is no evidence that this year’s students are performing significantly differently than students in previous
In the past, students in a particular course have achieved a mean Xmas exam score of 72.6, with a standard deviation of 12.5. This year, 15 students in one section achieved a mean Xmas exam score of 72.2, while 10 students in another section achieved a mean Xmas exam score of 77.3. Is the overall (grand) mean of the 25 students in this year's two sections significantly different from the mean obtained in previous years (α ≤ .05)? Answer: 2. Z = 0.656, do not reject Ho: there is no evidence that this year’s students are performing significantly differently than students in previous
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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2. In the past, students in a particular course have achieved a mean Xmas exam score of 72.6, with a standard deviation of 12.5. This year, 15 students in one section achieved a mean Xmas exam score of 72.2, while 10 students in another section achieved a mean Xmas exam score of 77.3. Is the overall (grand) mean of the 25 students in this year's two sections significantly different from the mean obtained in previous years (α ≤ .05)?
Answer:
2. Z = 0.656, do not reject Ho: there is no evidence that this year’s students are performing significantly differently than students in previous years
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