One year at a university, the algebra course director decided to experiment with a new teaching method that might reduce variability in final-exam scores by eliminating lower scores. The director randomly divided the algebra students who were registered for class at 9:4 A.M. into two groups. One of the groups, called the control group, was taught the usual algebra course; the other group, called the experimental group, was taught by the new teaching method. Both classes covered the same material, took the same unit quizzes, and took the same final exam at the same time. The final-exam scores (out of 40 possible) for the two groups are shown in the accompanying table. Find a 99% confidence interval for the ratio of the population standard deviations of final-exam scores for students taught by the conventional method and for students taught by the new method. Assume that both populations are normally distributed. (Note: s₁ = 6.61 $2 = 5.762, and for df = (19,40), Fo.005 = 2.63.) Click here to view the data table Click here to view page 1 of the F-distribution. Click here to view page 2 of the F-distribution. Click here to view page 3 of the F-distribution. Click here to view page 4 of the F-distribution. 01 The 99% confidence interval for - is 02 to ...
One year at a university, the algebra course director decided to experiment with a new teaching method that might reduce variability in final-exam scores by eliminating lower scores. The director randomly divided the algebra students who were registered for class at 9:4 A.M. into two groups. One of the groups, called the control group, was taught the usual algebra course; the other group, called the experimental group, was taught by the new teaching method. Both classes covered the same material, took the same unit quizzes, and took the same final exam at the same time. The final-exam scores (out of 40 possible) for the two groups are shown in the accompanying table. Find a 99% confidence interval for the ratio of the population standard deviations of final-exam scores for students taught by the conventional method and for students taught by the new method. Assume that both populations are normally distributed. (Note: s₁ = 6.61 $2 = 5.762, and for df = (19,40), Fo.005 = 2.63.) Click here to view the data table Click here to view page 1 of the F-distribution. Click here to view page 2 of the F-distribution. Click here to view page 3 of the F-distribution. Click here to view page 4 of the F-distribution. 01 The 99% confidence interval for - is 02 to ...
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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Transcribed Image Text:One year at a university, the algebra course director decided to experiment with a new teaching method that might reduce variability
in final-exam scores by eliminating lower scores. The director randomly divided the algebra students who were registered for class at 9:40
A.M. into two groups. One of the groups, called the control group, was taught the usual algebra course; the other group, called the
experimental group, was taught by the new teaching method. Both classes covered the same material, took the same unit quizzes, and
took the same final exam at the same time. The final-exam scores (out of 40 possible) for the two groups are shown in the accompanying
table. Find a 99% confidence interval for the ratio of the population standard deviations of final-exam scores for students taught by the
conventional method and for students taught by the new method. Assume that both populations are normally distributed. (Note: s₁ = 6.613,
$₂ = 5.762, and for df = (19,40), F0.005 = 2.63.)
Click here to view the data table
Click here to view page 1 of the F-distribution. Click here to view page 2 of the F-distribution.
Click here to view page 3 of the F-distribution. Click here to view page 4 of the F-distribution.
The 99% confidence interval for
0₁
02
is
to
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