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).
( , )
Homework Answers
![qnorm(.95) [1] 1.644854 qnorm.975) [1] 1.959964 qnorm.995) 11 2. 575829](http://img.homeworklib.com/questions/135d1f10-708f-11ea-9215-b1c7a63add9b.png?x-oss-process=image/resize,w_560)
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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 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 = 50 provided a sample mean of 23.5 and a sample standard deviation of 4.2.
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?
{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 = 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
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?...
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?
10. A simple random sample of size n is drawn. The sample mean x is found...
10. A simple random sample of size n is drawn. The sample mean x is found to be 39.1, and the sample standard deviation s is found to be 9.7. a) (2 points) Construct a 90% confidence interval for the population mean u if the sample size n is 41. b) (2 points) Construct a 90% confidence interval for the population mean y if the sample size n is 101. c) (2 points) Construct a 99% confidence interval for the...
10. A simple random sample of size n is drawn. The sample mean x is found...
10. A simple random sample of size n is drawn. The sample mean x is found to be 39.1, and the sample standard deviation s is found to be 9.7. a) (2 points) Construct a 90% confidence interval for the population mean w if the sample size n is 41. b) (2 points) Construct a 90% confidence interval for the population mean 4 if the sample size n is 101. c) (2 points) Construct a 99% confidence interval for the...
2. A simple random sample of size n is drawn. The sample mean I is found...
2. A simple random sample of size n is drawn. The sample mean I is found to be 53.1, and the sample standard deviation s is found to be 7.8 a) (3 points) Construct a 95% confidence interval for the population mean u if the sample size n is 81. b) (3 points) Construct a 95% confidence interval for the population mean u if the sample size n is 30. c) (3 points) Construct a 90% confidence interval for the...
A simple random sample of 40 items resulted in a sample mean of 30. The population...
A simple random sample of 40 items resulted in a sample mean of 30. The population standard deviation is o = 15. a. Compute the 95% confidence interval for the population mean. Round your answers to one decimal place. b. Assume that the same sample mean was obtained from a sample of 90 items. Provide a 95% confidence interval for the population mean. Round your answers to two decimal places.
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?
{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
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?...
10. A simple random sample of size n is drawn. The sample mean x is found to be 39.1, and the sample standard deviation s is found to be 9.7. a) (2 points) Construct a 90% confidence interval for the population mean u if the sample size n is 41. b) (2 points) Construct a 90% confidence interval for the population mean y if the sample size n is 101. c) (2 points) Construct a 99% confidence interval for the...
10. A simple random sample of size n is drawn. The sample mean x is found to be 39.1, and the sample standard deviation s is found to be 9.7. a) (2 points) Construct a 90% confidence interval for the population mean w if the sample size n is 41. b) (2 points) Construct a 90% confidence interval for the population mean 4 if the sample size n is 101. c) (2 points) Construct a 99% confidence interval for the...
2. A simple random sample of size n is drawn. The sample mean I is found to be 53.1, and the sample standard deviation s is found to be 7.8 a) (3 points) Construct a 95% confidence interval for the population mean u if the sample size n is 81. b) (3 points) Construct a 95% confidence interval for the population mean u if the sample size n is 30. c) (3 points) Construct a 90% confidence interval for the...
A simple random sample of 40 items resulted in a sample mean of 30. The population standard deviation is o = 15. a. Compute the 95% confidence interval for the population mean. Round your answers to one decimal place. b. Assume that the same sample mean was obtained from a sample of 90 items. Provide a 95% confidence interval for the population mean. Round your answers to two decimal places.
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