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QUESTION 5 A sample of 225 elements from a population with a standard deviation of 75...
QUESTION 15 5 points Save From a population that is normally distributed, a sample of 25...
QUESTION 15 5 points Save From a population that is normally distributed, a sample of 25 elements is selected and the standard deviation of the sample is computed. For the interval estimation of the proper distribution to use is the a normal distribution b. distribution with 26 degrees of freedom. c. distribution with 24 degrees of freedom d. distribution with 25 degrees of freedom.
A sample of 225 elements from a population with a standard deviation of 75 is selected....
A sample of 225 elements from a population with a standard deviation of 75 is selected. The sample mean is 150. The 95% confidence interval for m is:
3. From a population of 500 elements, a sample of 225 elements is selected. It is known...
3. From a population of 500 elements, a sample of 225 elements is selected. It is known that the population standard deviation is 25. Calculate the appropriate standard error of the mean (round to the 2nd decimal place).
A sample of 64 elements from a population with a standard deviation of 120 is selected....
A sample of 64 elements from a population with a standard deviation of 120 is selected. The sample mean is 170. You are asked to construct a 95% confidence interval for μ. The lower bound (or lower limit) for that interval is . . . (NOTE: Round your final answer to 2 decimal places - such as 14.12 or 31.00 or 99.55)
A sample of 250 observations is selected from a normal population for which the population. standard deviation is known to be 25.
2) A sample of 250 observations is selected from a normal population for which the population. standard deviation is known to be 25. The sample mean is 20 .a. Determine the standard error of the mean.b. Determine the 95 %confidence interval for the population mean.
A simple random sample of sirenie drewn from a population that is normally distributed. The sample...
A simple random sample of sirenie drewn from a population that is normally distributed. The sample mean, is found to be 105, and the sample standard deviations, is found to be 10 (a) Construct a 95% confidence interval about if the sample size, n, is 15. (b) Construct a 95% confidence interval about the sample sens 29 (c) Construct a confidence interval about the samples , n, is 15. (d) Could we have computed the confidence intervals in parts (a)(0)...
A statistics practitioner took a random sample of 54 observations from a population whose standard deviation...
A statistics practitioner took a random sample of 54 observations from a population whose standard deviation is 33 and computed the sample mean to be 105. Note: For each confidence interval, enter your answer in the form (LCL, UCL). You must include the parentheses and the comma between the confidence limits. A. Estimate the population mean with 95% confidence. Confidence Interval = B. Estimate the population mean with 90% confidence. Confidence interval = C. Estimate the population mean with 99%...
1- Suppose a simple random sample of sizen is drawn froma large population with mean u...
1- Suppose a simple random sample of sizen is drawn froma large population with mean u and standard deviation o. The sampling distribution of x has mean ug and standard deviation= 2- As the number of degrees of freedom in the t-distribution increase, the spread of the distribution 3- True or False: The value of to.10 with 5 degrees of freedom is greater than the value of to.10 with 10 degrees of freedom. 4- True or False: To construct a...
11. A random sample of 25 statistics examinations was taken. The average score in the sample...
11. A random sample of 25 statistics examinations was taken. The average score in the sample was 76 with a variance of 144. Assuming the scores are normally distributed, the 99% confidence interval for the population average examination score is 70.02 to 81.98 6. 69.82 to 82.18 70.06 to 81.94 d. 69.48 to 82.52 2. c. 12. It is known that the population variance equals 484. With a 0.95 probability, the sample size that needs to be taken to estimate...
you are given the sample mean and the population and standard deviation. use this information to...
you are given the sample mean and the population and standard deviation. use this information to construct the 90% and 95% confidence intervals for the population mean. interpret the results and compare the widths of the confidence intervals. from a random sample of 77 dates, the mean record high daily temp in a certain city has a mean of 85.13 degrees F, assume the population standard deviation is 15.32 degrees F the 90% confidence interval is? the 95% confidence interval...
QUESTION 15 5 points Save From a population that is normally distributed, a sample of 25 elements is selected and the standard deviation of the sample is computed. For the interval estimation of the proper distribution to use is the a normal distribution b. distribution with 26 degrees of freedom. c. distribution with 24 degrees of freedom d. distribution with 25 degrees of freedom.
A simple random sample of sirenie drewn from a population that is normally distributed. The sample mean, is found to be 105, and the sample standard deviations, is found to be 10 (a) Construct a 95% confidence interval about if the sample size, n, is 15. (b) Construct a 95% confidence interval about the sample sens 29 (c) Construct a confidence interval about the samples , n, is 15. (d) Could we have computed the confidence intervals in parts (a)(0)...
A statistics practitioner took a random sample of 54 observations from a population whose standard deviation is 33 and computed the sample mean to be 105. Note: For each confidence interval, enter your answer in the form (LCL, UCL). You must include the parentheses and the comma between the confidence limits. A. Estimate the population mean with 95% confidence. Confidence Interval = B. Estimate the population mean with 90% confidence. Confidence interval = C. Estimate the population mean with 99%...
1- Suppose a simple random sample of sizen is drawn froma large population with mean u and standard deviation o. The sampling distribution of x has mean ug and standard deviation= 2- As the number of degrees of freedom in the t-distribution increase, the spread of the distribution 3- True or False: The value of to.10 with 5 degrees of freedom is greater than the value of to.10 with 10 degrees of freedom. 4- True or False: To construct a...
11. A random sample of 25 statistics examinations was taken. The average score in the sample was 76 with a variance of 144. Assuming the scores are normally distributed, the 99% confidence interval for the population average examination score is 70.02 to 81.98 6. 69.82 to 82.18 70.06 to 81.94 d. 69.48 to 82.52 2. c. 12. It is known that the population variance equals 484. With a 0.95 probability, the sample size that needs to be taken to estimate...
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