3b. If the writing scores have a population standard deviation of o = 10, what conclusion should we make about the effectiveness of the new writing program? Assume a 2-tailed test with a = .05. %3D 3c. If the writing scores have a population standard deviation of o = 20, what conclusion should we make about the effectiveness of the new writing program? Assume a 2-tailed test with a = .05. %3D %3D
3b. If the writing scores have a population standard deviation of o = 10, what conclusion should we make about the effectiveness of the new writing program? Assume a 2-tailed test with a = .05. %3D 3c. If the writing scores have a population standard deviation of o = 20, what conclusion should we make about the effectiveness of the new writing program? Assume a 2-tailed test with a = .05. %3D %3D
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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Question 3 please. Thank you!
Transcribed Image Text:la. Find the t values that form the boundaries of the critical region for a one-tailed test with a=.05 for each
of the following df values:
8 = fp
df=24
or she
2. The following sample scores were obtained from a population with unknown parameters: 1,5.1.1
Please compute the sample mean, standard deviation, and estimated standard error for M.
3: A college is evaluating a new English course, and obtain a random sample ofn = 25 students to place into
this course their first semester. One year later, a writing sample was obtained from each of the 25 students,
and the average grade was M = 76. Writing scores for the population of all college students is u = 70.
%3D
%3D
3a. Please state the null hypothesis and the alternative hypothesis in statistical form.
Transcribed Image Text:3b. If the writing scores have a population standard deviation of o = 10, what conclusion should
we make about the effectiveness of the new writing program? Assume a 2-tailed test with a = .05.
%3D
3c. If the writing scores have a population standard deviation of o = 20, what conclusion should
we make about the effectiveness of the new writing program? Assume a 2-tailed test with a = .05.
%3D
%3D
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