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Fully and accurately answer the two questions with all of their parts. Fully and accurately answer the two questions with all of their parts.
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Homework 2
Total Points: 5
Due date: 07/10/2018
1.
(2.5 points) Suppose that we are testing H0 : µ = µ0 versus H1: µ ≠ µ0. Calculate the P-value
for the following observed values of the test statistic:
(a)
Z0 = 2.25
(b)
Z0 = 1.55
(c)
Z0 = 2.10
(d)
Z0 = 1.95
(e)
Z0 = -0.10
2. (2.5 points) The diameters of steel shafts produced by a certain manufacturing process should
have a mean diameter of 0.255 inches. The diameter is known to have a standard deviation
of = 0.0001 inch. A random sample of 10 shafts has an average diameter of 0.2545 inches.
a. S
et up the appropriate hypotheses on the mean.
b. Test these hypotheses using = 0.05. What are your conclusions?
c. Find the P-value for this test.
d. Construct a 95 percent confidence interval on the mean shaft diameter.
1
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Assignment requirements:
Find three websites, tech blogs, or academic journals as my sources. Find two articles, posts, or entries from each source. This is a total of six (6!) items you'll be writing on.
If you're having trouble finding inspiration on what to write about after reading your chosen source, ask yourself the following questions:
How does this affect the industry?
Who does this affect?
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If you do not have any go-to tech blogs or sites you currently frequent, try googling "best tech news sites" or "best tech blogs" for an easy starting point.
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