Question
In: Statistics and Probability
A manufacturer of furniture claims that the company's new model of bookshelves is easier to assemble...
A manufacturer of furniture claims that the company's new model of bookshelves is easier to assemble than the old model. To test the claim, 7 people were assigned to assemble bookshelves from each of the two models. Here are the times (in minutes) they needed to assemble the bookshelves.
Person
1 2 3 4 5 6 7
Old model 17 22 20 14 15 21 24
New model 15 19 18 13 15 19 23
a) Construct a 95% confidence interval for the differences.
b) Test if the mean assembly time for the new model is shorter than that of the old model using alpha = 0.05.
c) Now consider the data as two independent samples and conduct the test as a two sample test. Assume equal variances. Is the decision reversed?
Solutions
please like me my solution
sir/madam
orchestra answered 1 year agoRelated Solutions
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Question 1 options:
95%
68%
16%
99.7%
question 2
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The manufacturer of a new racecar engine claims that the proportion of engine failures due to...
The manufacturer of a new racecar engine claims that the
proportion of engine failures due to overheating for this new
engine, (p1) ( p 1 ) , will be no higher than the proportion of
engine failures due to overheating of the old engines, (p2) ( p 2 )
. To test this statement, NASCAR took a random sample of 175 175 of
the new racecar engines and 185 185 of the old engines. They found
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engine, (p1), will be no higher than the proportion of engine
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