Prob-3 Breaking strengths of a random sample of 28 molded plastic housing were measured, and a sample standard deviation of S=19.52 was obtained. A confidence interval (439.23, 460.77) for the average strength of molded plastic housings were constructed from these results. What is the confidence level of this confidence interval? Solution: ta/2 = ?; [Conf. Level]=1-α = ?....... % X - for 2 S Vñ S μ = + 2√H

MATLAB: An Introduction with Applications
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Prob-3
Breaking strengths of a random sample of 28 molded plastic housing were measured, and a sample standard deviation of S=19.52 was obtained. A
confidence interval (439.23, 460.77) for the average strength of molded plastic housings were constructed from these results. What is the confidence level of
this confidence interval?
Solution:
[7
x
-
for 2
S
Vñ
ta/2 =?;
S
4 == 8 + 10/2² √]
{012 ]
[Conf. Level]-1-α = ...
?....... %
Transcribed Image Text:Prob-3 Breaking strengths of a random sample of 28 molded plastic housing were measured, and a sample standard deviation of S=19.52 was obtained. A confidence interval (439.23, 460.77) for the average strength of molded plastic housings were constructed from these results. What is the confidence level of this confidence interval? Solution: [7 x - for 2 S Vñ ta/2 =?; S 4 == 8 + 10/2² √] {012 ] [Conf. Level]-1-α = ... ?....... %
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