Homework Answers
Solution:
Option(A) is correct.
Confidence interval (31.25 , 34.35) is correct.
Proof:
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EN 4) Assume the population is normally distributed and for given n = 20, x =...
[40] QUESTION 4 Assume that X is normally distributed and that a random sample of size...
[40] QUESTION 4 Assume that X is normally distributed and that a random sample of size n = 20 from this distribution yielded the following statistics: X = 31 and S=7. (a) Is there strong evidence to conclude that Ho : q2 = 30 against H:02 #30 at the a = 0.05 level of significance? (b) Construct a 90% confidence interval for the population standard deviation. [15] [100]
A simple random sample of size n is drawn from a population that is normally distributed....
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 22. (b) Construct a 90% confidence interval about u if the sample size, n, is 27. (c) Construct a 99% confidence interval about u if the sample size, n, is...
simple random sample of size n is drawn from a population that is normally distributed. The...
simple random sample of size n is drawn from a population that is normally distributed. The sample mean, X. is found to be 111, and the sample standard deviation is found to be 10. a) Construct a 95% confidence interval about if the sample size, n, is 28. b) Construct a 95% confidence interval about if the sample size, n, is 11 c) Construct a 90% confidence interval about if the sample size, n, is 28 ) Could we have...
rom a population that is normally distributed. The sample mean is found to be x-69 and...
rom a population that is normally distributed. The sample mean is found to be x-69 and he sample standard deviation is found to be s-12. Construct a 90% confidence interval A simple random sample of size n-16 s drawn about the population mean. The 90% confidence interval is OD (Round to two decimal places as needed.)
Construct the indicated confidence interval for the population mean mu μ using the t-distribution. Assume the...
Construct the indicated confidence interval for the population mean mu μ using the t-distribution. Assume the population is normally distributed. c equals = 0.90 0.90, x overbar x equals = 14.1 14.1, s equals = 4.0 4.0, n equals = 6 6 The 90 90% confidence interval using a t-distribution is left parenthesis nothing comma nothing right parenthesis . , .
A simple random sample of size n is drawn from a population that is normally distributed....
A simple random sample of size n is drawn from a population that is normally distributed. The sample mean, x, is found to be 115, and the sample standard deviation, s, is found to be 10 (a) Construct a 98% confidence interval about if the sample size, n, s 14 (b) Construct a 98% confidence interval about μ if the sample size, n, is 19 (c) Construct a 99% confidence interval about if the sample size, n, s 14 (d)...
If X-67, S-20, and n-49, and assuming that the population is normally distributed, construct a 99%...
If X-67, S-20, and n-49, and assuming that the population is normally distributed, construct a 99% confidence interval estimate of the population mean, μ Click here to view page 1 of the table of critical values for the tdistribution Click here to view page 2 of the table of critical values for the t distribution (Round to two decimal places as needed.)
A simple random sample of size n is drawn from a population that is normally distributed....
A simple random sample of size n is drawn from a population that is normally distributed. The sample mean, x overbar, is found to be 108, and the sample standard deviation, s, is found to be 10. (a) Construct a 95% confidence interval about mu if the sample size, n, is 25. (b) Construct a 95% confidence interval about mu if the sample size, n, is 12. (c) Construct a 70% confidence interval about mu if the sample size, n,...
The sampled population is normally distributed, with the given information. (Round your answers to two decimal...
The sampled population is normally distributed, with the given information. (Round your answers to two decimal places.) n = 10, x = 29.5, and 0 = 6.4 (a) Find the 0.95 confidence interval for u. to (b) Are the assumptions satisfied? Explain. W Yes, the sampled population is normally distributed. O No, the sample distribution is not normally distributed. O not enough information You may need to use the appropriate table in Appendix B to answer this question.
A simple random sample of size n is drawn from a population that is normally distributed....
A simple random sample of size n is drawn from a population that is normally distributed. The sample mean, x overbar x, is found to be 107, and the sample standard deviation, s, is found to be 10. (a) Construct a 98% confidence interval about mu μ if the sample size, n, is 18. (b) Construct a 98% confidence interval about mu μnif the sample size, n, is 12. c) Construct a 96% confidence interval about mu μ if...
[40] QUESTION 4 Assume that X is normally distributed and that a random sample of size n = 20 from this distribution yielded the following statistics: X = 31 and S=7. (a) Is there strong evidence to conclude that Ho : q2 = 30 against H:02 #30 at the a = 0.05 level of significance? (b) Construct a 90% confidence interval for the population standard deviation. [15] [100]
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 22. (b) Construct a 90% confidence interval about u if the sample size, n, is 27. (c) Construct a 99% confidence interval about u if the sample size, n, is...
simple random sample of size n is drawn from a population that is normally distributed. The sample mean, X. is found to be 111, and the sample standard deviation is found to be 10. a) Construct a 95% confidence interval about if the sample size, n, is 28. b) Construct a 95% confidence interval about if the sample size, n, is 11 c) Construct a 90% confidence interval about if the sample size, n, is 28 ) Could we have...
rom a population that is normally distributed. The sample mean is found to be x-69 and he sample standard deviation is found to be s-12. Construct a 90% confidence interval A simple random sample of size n-16 s drawn about the population mean. The 90% confidence interval is OD (Round to two decimal places 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 115, and the sample standard deviation, s, is found to be 10 (a) Construct a 98% confidence interval about if the sample size, n, s 14 (b) Construct a 98% confidence interval about μ if the sample size, n, is 19 (c) Construct a 99% confidence interval about if the sample size, n, s 14 (d)...
If X-67, S-20, and n-49, and assuming that the population is normally distributed, construct a 99% confidence interval estimate of the population mean, μ Click here to view page 1 of the table of critical values for the tdistribution Click here to view page 2 of the table of critical values for the t distribution (Round to two decimal places as needed.)
The sampled population is normally distributed, with the given information. (Round your answers to two decimal places.) n = 10, x = 29.5, and 0 = 6.4 (a) Find the 0.95 confidence interval for u. to (b) Are the assumptions satisfied? Explain. W Yes, the sampled population is normally distributed. O No, the sample distribution is not normally distributed. O not enough information You may need to use the appropriate table in Appendix B to answer this question.
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