[Solution Library] A random sample of 41 observations was selected from a normally distributed population. The sample mean was = 61, and the sample variance was
Question:
A random sample of 41 observations was selected from a normally distributed population. The sample mean was
= 61, and the sample variance was s
2
= 18.0. Does the sample show sufficient reason to conclude that the population standard deviation is not equal to 4 at the 0.05 level of significance? Use the
p
-value method
State the null and alternate hypotheses
Determine which test statistic applies, and calculate it
Determine the corresponding probability, and compare to
State your decision: Should the null hypothesis be rejected?
Deliverable: Word Document 
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