A sample of 52 copper wires had a mean resistance of 1.03 mΩ. (Assume that the...
A sample of 52 copper wires had a mean resistance of 1.03 mΩ. (Assume that the standard deviation for resistance is known to be 0.1 mΩ.) Let μ represent the mean resistance of copper wires of this type.
Find the P-value for testing H0 : μ ≤ 1 versus H1 : μ > 1.
Homework Answers
this is the right tailed test .
The null and alternative hypothesis is ,
H0 : μ ≤ 1 versus H1 : μ > 1
Test statistic = z
= (
- 
) / 
/ 
n
= (1.03 - 1) / 0.1/
52
= 2.16
P(z > 2.16) = 1 - P(z < 2.16) = 1 - 0.9846=0.0154
P-value = 0.0154
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