A simple random sample with n = 50 provided a sample mean of 23.5 and a sample standard deviation of 4.2.
a. Develop a 90% confidence interval for the population mean (to 1 decimal).
b. Develop a 95% confidence interval for the population mean (to 1 decimal).
c. Develop a 99% confidence interval for the population mean (to 1 decimal).
d. What happens to the margin of error and the confidence interval as the confidence level is increased?
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A simple random sample with n = 50 provided a sample mean of 23.5 and a sample standard deviation of 4.2.
A simple random sample with n=56 provided a sample mean of 21.0 and a sample standard...
A simple random sample with n=56 provided a sample mean of 21.0 and a sample standard deviation of 4.7 . a. Develop a 90% confidence interval for the population mean (to 1 decimal). b. Develop a 95% confidence interval for the population mean (to 1 decimal). c.Develop a 99% confidence interval for the population mean (to 1 decimal). d. What happens to the margin of error and the confidence interval as the confidence level is increased?
A simple random sample with n = 56 provided a sample mean of 23.5 and a...
A simple random sample with n = 56 provided a sample mean of 23.5 and a sample standard deviation of 4.7. a. Develop a 90% confidence interval for the population mean (to 1 decimal). ( , ) b. Develop a 95% confidence interval for the population mean (to 1 decimal). ( , ) c. Develop a 99% confidence interval for the population mean (to 1 decimal). ( , )
Exercise 8.14 Algorithmic) A simple random sample with n 54 provided a sample mean of 22.0...
Exercise 8.14 Algorithmic) A simple random sample with n 54 provided a sample mean of 22.0 and a sample standard deviation of 4.1 a. Develop a 90% confidence interval for the population mean (to 2 decimals) b. Develop a 95% confidence interval for the population mean (to 2 decimals). c. Develop a 99% confidence interval for the population mean (to 2 decimals) d. What happens to the margin of error and the confidence interval as the confidence level is increased?...
{Exercise 8.14 Algorithmic} A simple random sample with n = 56 provided a sample mean of...
{Exercise 8.14 Algorithmic} A simple random sample with n = 56 provided a sample mean of 21.0 and a sample standard deviation of 4.5. a. Develop a 90% confidence interval for the population mean (to 2 decimals). ( 20 ®, 22 ) b. Develop a 95% confidence interval for the population mean (to 2 decimals). c. Develop a 99% confidence interval for the population mean (to 2 decimals). d. What happens to the margin of error and the confidence interval...
A simple random sample with n =54 provided a sample mean of 24.0 and a sample...
A simple random sample with n =54 provided a sample mean of 24.0 and a sample standard deviation of 4.5. a. develop a 90% CI for the pop mean b. develop a 95% CI for the pop mean c. develop a 99% CI for the pop mean d. what happens to the margin of error and the CI as the confidence level increases?
A simple random sample with n = 58 provided a sample mean of 26.5 and a...
A simple random sample with n = 58 provided a sample mean of 26.5 and a sample standard deviation of 4.4. (Round your answers to one decimal place.) (a) Develop a 90% confidence interval for the population mean. 25.5 to 27.5 (b) Develop a 95% confidence interval for the population mean. to 27.7 25.3 (C) Develop a 99% confidence interval for the population mean. 24.9 x to 28.1 x
A simple random sample of size n is drawn. The sample mean, x, is found to...
A simple random sample of size n is drawn. The sample mean, x, is found to be 19.4, and the sample standard deviation, s, is found to be 4.9. Click the icon to view the table of areas under the t-distribution. (a) Construct a 95% confidence interval about if the sample size, n, is 35. Lower bound: :Upper bound: (Use ascending order. Round to two decimal places as needed.) (b) Construct a 95% confidence interval about if the sample size,...
A simple random sample of 60 items resulted in a sample mean of 90. The population...
A simple random sample of 60 items resulted in a sample mean of 90. The population standard deviation is 13. 1) Compute the 95% confidence interval for the population mean (to 1 decimal). 2) Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence interval for the population mean (to 2 decimals). 3) What is the effect of a larger sample size on the margin of error?
A simple random sample of 30 items resulted in a sample mean of 50. The population...
A simple random sample of 30 items resulted in a sample mean of 50. The population standard deviation is σ = 10. a. Compute the 95% confidence interval for the population mean. Round your answers to one decimal place. Enter your answer using parentheses and a comma, in the form (n1,n2). Do not use commas in your numerical answer (i.e. use 1200 instead of 1,200, etc.) b. Assume that the same sample mean was obtained from a sample of 90...
A simple random sample of 50 items from a population with standard dev=7 resulted in a sample...
A simple random sample of 50 items from a population with standard dev=7 resulted in a sample mean of 36. If required, round your answers to two decimal places. a. Provide a 90% confidence interval for the population mean. to b. Provide a 95% confidence interval for the population mean. to c. Provide a 99% confidence interval for the population mean.
Exercise 8.14 Algorithmic) A simple random sample with n 54 provided a sample mean of 22.0 and a sample standard deviation of 4.1 a. Develop a 90% confidence interval for the population mean (to 2 decimals) b. Develop a 95% confidence interval for the population mean (to 2 decimals). c. Develop a 99% confidence interval for the population mean (to 2 decimals) d. What happens to the margin of error and the confidence interval as the confidence level is increased?...
{Exercise 8.14 Algorithmic} A simple random sample with n = 56 provided a sample mean of 21.0 and a sample standard deviation of 4.5. a. Develop a 90% confidence interval for the population mean (to 2 decimals). ( 20 ®, 22 ) b. Develop a 95% confidence interval for the population mean (to 2 decimals). c. Develop a 99% confidence interval for the population mean (to 2 decimals). d. What happens to the margin of error and the confidence interval...
A simple random sample with n = 58 provided a sample mean of 26.5 and a sample standard deviation of 4.4. (Round your answers to one decimal place.) (a) Develop a 90% confidence interval for the population mean. 25.5 to 27.5 (b) Develop a 95% confidence interval for the population mean. to 27.7 25.3 (C) Develop a 99% confidence interval for the population mean. 24.9 x to 28.1 x
A simple random sample of size n is drawn. The sample mean, x, is found to be 19.4, and the sample standard deviation, s, is found to be 4.9. Click the icon to view the table of areas under the t-distribution. (a) Construct a 95% confidence interval about if the sample size, n, is 35. Lower bound: :Upper bound: (Use ascending order. Round to two decimal places as needed.) (b) Construct a 95% confidence interval about if the sample size,...
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