A sample of 10 observations from a normally distributed population produced the following data: 22 20 28 34 26 21 26 30 25 31 Construct a 95% confidence interval for the population mean.
23.05 to 29.55
25.66 to 30.94
24.10 to 30.50
23.48 to 29.12
A sample of 10 observations from a normally distributed population produced the following data: 22 20...
A simple random sample of size nis drawn from a population that is normally distributed the sample mean is found to be 113, and the sample standard deviations, is found to be 10 (a) Construct a 95% confidence interval about if the sample size is 22 (b) Construct a 95% confidence interval about the sample on 26 (c) Construct a 90% confidence interval about the sample size is 22 (d) Could we have computed the confidence intervals in parts(a-c) if...
A sample of 18 observations taken from a normally distributed population produced the following data: 28.1 27.4 25.1 25.1 31.5 23.3 26.2 24.3 28.4 37.1 23.5 28.8 27.5 25.4 27.1 25.4 22.7 22.7 Round your answers to three decimal places a. What is the point estimate of ? b. Make a 95% confidence interval for a. What is the point estimate of b. Make a 95% confidence interval for c. What is the margin of error of estimate for in...
A sample of 18 observations taken from a normally distributed population produced the following data: 28.3 27.3 25.4 25.3 31.4 23.4 26.3 24.4 28.1 37.3 23.6 28.6 27.7 25.5 27.5 25.4 22.5 22.9 Round your answers to three decimal places. a. What is the point estimate of μ? x¯= b. Make a 95% confidence interval for μ. (,) c. What is the margin of error of estimate for μ in part b? E=
A sample of 29 observations selected from a normally distributed population gives a mean of 241 and a sample standard deviation of s=13.2. Create a 95% confidence interval for µ. Use a T-Interval and round all values to 2 decimal places. The 95% confidence interval runs from to .
A simple random sample of size n is drawn from a population that is normally distributed. The sample mean, x̅, is found to be 107 , and the sample standard deviation, s, is found to be 10 .(a) Construct a 98 % confidence interval about μ if the sample size, n, is 22 .(b) Construct a 98 % confidence interval about μ if the sample size, n, is 12 .(c) Construct a 95 % confidence interval about μ if the...
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,...
10. Properties of a confidence interval Suppose the mean of a population is 22. A researcher (who does not know that p Then she constructs a 95% confidence interval of the population mean. 22) selects a random sample of size n from this population. The true population mean and the researcher's 95% confidence interval of the population mean are shown in the following graph. Use the graph to answer the questions that follow Sample Mean 95% Confidence interval of 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...
A simple random sample of size n=20 is drawn from a population that is normally distributed with o = 11. The sample mean is found to be x = 59. Construct a 95% confidence interval about the population mean. The 95% confidence interval is . (Use ascending order. Round to two decimal places as needed.)
1. A random sample of 25 observations was selected from a normally distributed population. The average in the sample was 84.6 with a variance of 400.a. Construct a 90% confidence interval for μ.b. Construct a 99% confidence interval for μ.c. Discuss why the 90% and 99% confidence intervals are different.d. What would you expect to happen to the confidence interval in part (a) if the sample size was increased? Be sure to explain your answer.