(b) Construct a 90% confidence interval about u if the sample size, n, is 22 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 106, and the sample standard deviation, s, is found to be 10
(a) Construct a 90% confidence interval about u if the sample size, n, is 18.
(b) Construct a 90% confidence interval about u if the sample size, n, is 22.
(c) Construct a 96% confidence interval about u if the sample size, n, is 18.
(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 90% confidence interval about u if the sample size, n, is 18
Lower bound: 101.9 ; Upper bound: 110.1
(Use ascending order. Round to one decimal place as needed.)
(b) Construct a 90% confidence interval about u if the sample size, n, is 22.
Lower bound:; Upper bound:
(Use ascending order. Round to one decimal place as needed.)
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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 106, and the sample standard deviation, s, is found to be 10 (a) Construct a 90% confidence interval about u if the sample size, n, is 18. (b) Construct a 90% confidence interval about u if the sample size, n, is 22. (c) Construct a 96% confidence interval about u if the sample size, n, is 18. (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 90% confidence interval about u if the sample size, n, is 18 Lower bound: 101.9 ; Upper bound: 110.1 (Use ascending order. Round to one decimal place as needed.) (b) Construct a 90% confidence interval about u if the sample size, n, is 22. Lower bound:; Upper bound: (Use ascending order. Round to one decimal place as needed.) Clear all Get more help - Tutoring Help me solve this MacBook Pro G Search or type URL esc & @ 23 2$ 7 8 2 3 4
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