A simple random sample of size n is drawn from a population that is normally distributed. The sample mean, x, is found to be 113, and the sample standard deviation, s, is found to be 10. (a) Construct a 96% confidence interval about u if the sample size, n, is 15. (b) Construct a 96% confidence interval about u if the sample size, n, is 23. (c) Construct a 99% confidence interval about u if the sample size, n, is 15. (d) Could we have computed the confidence intervals in parts (a)-(c) if the population had not been normally distributed? E Click the icon to view the table of areas under the t-distribution. (a) Construct a 96% confidence interval about u if the sample size, n, is 15. Lower bound: Upper bound: (Use ascending order. Round to one decimal place as needed.)
A simple random sample of size n is drawn from a population that is normally distributed. The sample mean, x, is found to be 113, and the sample standard deviation, s, is found to be 10. (a) Construct a 96% confidence interval about u if the sample size, n, is 15. (b) Construct a 96% confidence interval about u if the sample size, n, is 23. (c) Construct a 99% confidence interval about u if the sample size, n, is 15. (d) Could we have computed the confidence intervals in parts (a)-(c) if the population had not been normally distributed? E Click the icon to view the table of areas under the t-distribution. (a) Construct a 96% confidence interval about u if the sample size, n, is 15. Lower bound: Upper bound: (Use ascending order. Round to one decimal place as needed.)
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![A simple random sample of size n is drawn from a population that is normally distributed. The sample mean, x, is found to be 113, and the sample standard deviation, s, is found to be 10.
(a) Construct a 96% confidence interval about u if the sample size, n, is 15.
(b) Construct a 96% confidence interval about u if the sample size, n, is 23.
(c) Construct a 99% confidence interval about u if the sample size, n, is 15.
(d) Could we have computed the confidence intervals in parts (a)-(c) if the population had not been normally distributed?
E Click the icon to view the table of areas under the t-distribution.
(a) Construct a 96% confidence interval about u if the sample size, n, is 15.
Lower bound:
Upper bound:
(Use ascending order. Round to one decimal place as needed.)
Enter your answer in the edit fields and then click Check Answer.
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Transcribed Image Text:A simple random sample of size n is drawn from a population that is normally distributed. The sample mean, x, is found to be 113, and the sample standard deviation, s, is found to be 10.
(a) Construct a 96% confidence interval about u if the sample size, n, is 15.
(b) Construct a 96% confidence interval about u if the sample size, n, is 23.
(c) Construct a 99% confidence interval about u if the sample size, n, is 15.
(d) Could we have computed the confidence intervals in parts (a)-(c) if the population had not been normally distributed?
E Click the icon to view the table of areas under the t-distribution.
(a) Construct a 96% confidence interval about u if the sample size, n, is 15.
Lower bound:
Upper bound:
(Use ascending order. Round to one decimal place as needed.)
Enter your answer in the edit fields and then click Check Answer.
5 parts
remaining
Clear All
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P Type here to search
回 EN
* 144
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