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A random sample of n = 7 observations from a normal
Chapter 7, Problem 86E(choose chapter or problem)
Problem 86E
A random sample of n = 7 observations from a normal population produced the following measurements: 4, 0, 6, 3, 3, 5, 9. Do the data provide sufficient evidence to indicate that < 1? Test using = .05.
Questions & Answers
QUESTION:
Problem 86E
A random sample of n = 7 observations from a normal population produced the following measurements: 4, 0, 6, 3, 3, 5, 9. Do the data provide sufficient evidence to indicate that < 1? Test using = .05.
ANSWER:
Answer
Step 1 of 1
Our goal is Test the claim that the standard deviation of waiting times is less than 1.9 min.
A random sample of observations from a normal population produced the following measurements:
Do the data provide sufficient evidence to indicate that
Use in the test.
Let’s find the sample variance, because the sample variance is the point estimator of the population variance
The sample variance,
……….(1)
We can rewrite equation (1) as,
[from the measurements]
Hence to determine if we