(a) Suppose you collect a SRS of size n from a population and from the data collected you computed a 95% confidence interval for the mean of the population. Which of the following would produce a new confidence interval with larger width (larger margin of error) based on these same data? A. Use a larger confidence level. B. Use the same confidence level, but compute the interval n times. Approximately 5% of these intervals will be larger. C. Nothing can guarantee absolutely that you will get a larger interval. One can only say the chance of obtaining a larger interval is 0.05.

MATLAB: An Introduction with Applications
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Chapter1: Starting With Matlab
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For each problem, select the best response.
(a) Suppose you collect a SRS of size n from a
population and from the data collected you computed
a 95% confidence interval for the mean of the
population. Which of the following would produce a
new confidence interval with larger width (larger
margin of error) based on these same data?
A. Use a larger confidence level.
B. Use the same confidence level, but compute the
interval n times. Approximately 5% of these
intervals will be larger.
C. Nothing can guarantee absolutely that you will
get a larger interval. One can only say the chance
of obtaining a larger interval is 0.05.
D. Use a smaller confidence level.
E. None of the above.
(b) A 95% confidence interval for the mean
μ of a population is computed from a random sample
and found to be
10 ± 4. We may conclude
A. that there is a 95% probability that the true
mean is 10 and a 95% chance the true margin of
error is 4.
B. 95% of the population is between 6 and 14.
C. that if we took many, many additional samples
and from each computed a 95% confidence
interval for
μ, approximately 95% of these intervals would
contain
μ.
D. that there is a 95% probability that
μ is between 6 and 14.
E. All of the above.
Transcribed Image Text:For each problem, select the best response. (a) Suppose you collect a SRS of size n from a population and from the data collected you computed a 95% confidence interval for the mean of the population. Which of the following would produce a new confidence interval with larger width (larger margin of error) based on these same data? A. Use a larger confidence level. B. Use the same confidence level, but compute the interval n times. Approximately 5% of these intervals will be larger. C. Nothing can guarantee absolutely that you will get a larger interval. One can only say the chance of obtaining a larger interval is 0.05. D. Use a smaller confidence level. E. None of the above. (b) A 95% confidence interval for the mean μ of a population is computed from a random sample and found to be 10 ± 4. We may conclude A. that there is a 95% probability that the true mean is 10 and a 95% chance the true margin of error is 4. B. 95% of the population is between 6 and 14. C. that if we took many, many additional samples and from each computed a 95% confidence interval for μ, approximately 95% of these intervals would contain μ. D. that there is a 95% probability that μ is between 6 and 14. E. All of the above.
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