(c) How large would the sample need to be so that a 95% confidence interval would have a margin of error of 1.0? The sample size would need to be
(c) How large would the sample need to be so that a 95% confidence interval would have a margin of error of 1.0? The sample size would need to be
College Algebra (MindTap Course List)
12th Edition
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:R. David Gustafson, Jeff Hughes
Chapter8: Sequences, Series, And Probability
Section8.7: Probability
Problem 58E: What is meant by the sample space of an experiment?
Related questions
Question
Please assist with Part 3 of 3 ??
![Part 3 of 3
(c) How large would the sample need to be so that a 95% confidence interval would have a margin of error of 1.0?
The sample size would need to be](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe080cb7f-ff96-49e1-a335-f0200ccbc5c5%2F4ac6b12d-3369-4da6-84cc-259fc470eb8d%2F18hcdi_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Part 3 of 3
(c) How large would the sample need to be so that a 95% confidence interval would have a margin of error of 1.0?
The sample size would need to be
![Drill lifetime: A sample of 50 drills had a mean lifetime of 12.05 holes drilled when drilling a low-carbon steel. Assume the population
standard deviation is 6.56 .
Part 1 of 3
(a) Construct a 95% confidence interval for the mean lifetime of this type of drill. Use tables or technology. Round your answers to
at least two decimal places.
CD-
The confidence interval is
Part 2 of 3
(b) The manufacturer of the drills claims that the mean lifetime is greater than 13. Does this confidence interval contradict this
claim?
(Choose one) ▼
the confidence interval (Choose one)
values greater than 13, so the
claim (Choose one) ▼ contradicted.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe080cb7f-ff96-49e1-a335-f0200ccbc5c5%2F4ac6b12d-3369-4da6-84cc-259fc470eb8d%2Fq0orkb_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Drill lifetime: A sample of 50 drills had a mean lifetime of 12.05 holes drilled when drilling a low-carbon steel. Assume the population
standard deviation is 6.56 .
Part 1 of 3
(a) Construct a 95% confidence interval for the mean lifetime of this type of drill. Use tables or technology. Round your answers to
at least two decimal places.
CD-
The confidence interval is
Part 2 of 3
(b) The manufacturer of the drills claims that the mean lifetime is greater than 13. Does this confidence interval contradict this
claim?
(Choose one) ▼
the confidence interval (Choose one)
values greater than 13, so the
claim (Choose one) ▼ contradicted.
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