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A random sample of 16 items is drawn from a population whose standard deviation is unknown. The sample mean is = 890 and the sample standard deviation is s= 15. Use Appendix D to find the values of Student's t. (a) Construct an interval estimate of u with 95% confidence. (Round your answers to 3 decimal places.) The 95% confidence interval is from O t o D (b) Construct an interval estimate of u with 95% confidence, assuming that s=...
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A random sample of 28 items is drawn from a population whose standard deviation is unknown. The sample mean is x = 790 and the sample standard deviation is s=15. Use Appendix D to find the values of Student'st (a) Construct an interval estimate of u with 99% confidence. (Round your answers to 3 decimal places.) The 99% confidence interval is from 780:36 to 737854 (b) Construct an interval estimate of u with 99% confidence, assuming that s- 30. (Round...
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a
random sample of 11 items is drawn from a population whose standard
deviation is unknown. The sample mean is x= 920 and the sample
standard deviation is s = 25. Use Appendix D to find the values of
Studengs t.
a) Construct an interval estimate of u with 95%
confidence.
b) Construct an interval estimate of u with 95% confidence,
assuming tha s=50.
c) Construct an interval estimate of u with 95% confidence,
assuming that s= 100
Round your...
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Use the sample information x¯ = 43, σ = 3, n = 13 to calculate
the following confidence intervals for μ assuming the sample is
from a normal population. (a) 90 percent confidence. (Round your
answers to 4 decimal places.) The 90% confidence interval is from
to (b) 95 percent confidence. (Round your answers to 4 decimal
places.) The 95% confidence interval is from to (c) 99 percent
confidence. (Round your answers to 4 decimal places.) The 99%
confidence interval...
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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 95% confidence interval about if the sample size, n, is 25. (b) Construct a 95% confidence interval about if the sample size, n, is 13 (c) Construct a 90% confidence interval about if the sample size, n, is 25. (d) Could...
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A simple random sample of size nis drawn from a population that is normally distributed. The sample mean, X, is found to be 106, and the sample standard deviations, is found to be 9. (a) Construct a 95% confidence interval about if the sample size, n, is 26 (b) Construct a 95% confidence interval about if the sample size, n, is 13 (c) Construct a 90% confidence interval about if the sample size, n, is 26 (d) Should the confidence...
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A random sample of 24 observations is used to estimate the population mean. The sample mean and the sample standard deviation are calculated as 128.4 and 26.80, respectively. Assume that the population is normally distributed. [You may find it useful to reference the t table.) a. Construct the 95% confidence interval for the population mean. (Round intermediate calculations to at least 4 decimal places. Round "t" value to 3 decimal places and final answers to 2 decimal places.) Confidence interval...
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A sample of size n=20 is drawn from an approximately normal
population whose standard deviation is 15.5 The sample mean is
46.2. Construct a 95% confidence interval for μ.
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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 110, and the sample standard deviation, s, is found to be 10 (a) Construct an 80% confidence interval about p if the sample size, n, is 14 (b) Construct an 80% confidence interval about if the sample size, n, is 18. (c) Construct a 98% confidence interval about if the sample size, n, is 14. (d)...
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is found to be 10 A simple random sample of size nis drawn from a population that is normally distributed. The sample mean is found to be 112, and the sample standard deviation (a) Construct a 90% confidence interval about the sample sen, 29. (b) Construct a 96confidence interval about if the sample size is 11 (c) Construct a 70% condence interval about the sample sen, 29. (d) Could we have computed the confidence intervals in parts (He) if the...
A random sample of 16 items is drawn from a population whose standard deviation is unknown. The sample mean is = 890 and the sample standard deviation is s= 15. Use Appendix D to find the values of Student's t. (a) Construct an interval estimate of u with 95% confidence. (Round your answers to 3 decimal places.) The 95% confidence interval is from O t o D (b) Construct an interval estimate of u with 95% confidence, assuming that s=...
A random sample of 28 items is drawn from a population whose standard deviation is unknown. The sample mean is x = 790 and the sample standard deviation is s=15. Use Appendix D to find the values of Student'st (a) Construct an interval estimate of u with 99% confidence. (Round your answers to 3 decimal places.) The 99% confidence interval is from 780:36 to 737854 (b) Construct an interval estimate of u with 99% confidence, assuming that s- 30. (Round...
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 95% confidence interval about if the sample size, n, is 25. (b) Construct a 95% confidence interval about if the sample size, n, is 13 (c) Construct a 90% confidence interval about if the sample size, n, is 25. (d) Could...
A simple random sample of size nis drawn from a population that is normally distributed. The sample mean, X, is found to be 106, and the sample standard deviations, is found to be 9. (a) Construct a 95% confidence interval about if the sample size, n, is 26 (b) Construct a 95% confidence interval about if the sample size, n, is 13 (c) Construct a 90% confidence interval about if the sample size, n, is 26 (d) Should the confidence...
A random sample of 24 observations is used to estimate the population mean. The sample mean and the sample standard deviation are calculated as 128.4 and 26.80, respectively. Assume that the population is normally distributed. [You may find it useful to reference the t table.) a. Construct the 95% confidence interval for the population mean. (Round intermediate calculations to at least 4 decimal places. Round "t" value to 3 decimal places and final answers to 2 decimal places.) Confidence interval...
A simple random sample of size n is drawn from a population that is normally distributed. The sample mean, X, is found to be 110, and the sample standard deviation, s, is found to be 10 (a) Construct an 80% confidence interval about p if the sample size, n, is 14 (b) Construct an 80% confidence interval about if the sample size, n, is 18. (c) Construct a 98% confidence interval about if the sample size, n, is 14. (d)...
is found to be 10 A simple random sample of size nis drawn from a population that is normally distributed. The sample mean is found to be 112, and the sample standard deviation (a) Construct a 90% confidence interval about the sample sen, 29. (b) Construct a 96confidence interval about if the sample size is 11 (c) Construct a 70% condence interval about the sample sen, 29. (d) Could we have computed the confidence intervals in parts (He) if the...