Homework Answers
ANSWER:
1) 94%
2) FALL WITHIN THE POPULATION PARAMETER.
Reason for both the answer is the definition of confidence level which says that the probability of the value of the population parameter will fall within the range of values given.
your match the following is correct.
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3. Question 3 Aa Aa E A confidence interval estimate is an estimate of a population...
6. Interval estimation, z, t, and sample size Aa Aa Which of the following statements about...
6. Interval estimation, z, t, and sample size Aa Aa Which of the following statements about the confidence interval for a population mean are true? Check all that apply. when σ is known, Χ Ζα/2ƠNn is a good interval approximation, provided the population is normally distributed when σ is unknown, x ta/2s Nn is a good interval approximation, provided the sample size is sufficiently large. when σ is known, X za/20, Vn is a good interval approximation, provided the sample...
A confidence interval of .99 can correctly be interpreted to mean that: a. 99% of the...
A confidence interval of .99 can correctly be interpreted to mean that: a. 99% of the time in repeated sampling intervals using an appropriate formula will contain the sample value. b. 99% of the time in repeated sampling intervals using an appropriate formula will contain the relevant population parameter c. 99% of the time in repeated sampling intervals using an appropriate formula will contain the sample value as the midpoint of the interval d. 99% of the time in repeated...
Confidence Interval - Definition A confidence interval is random estimator of a population parameter value. It...
Confidence Interval - Definition A confidence interval is random estimator of a population parameter value. It is typically computed at a 95% confidence level such that 95% of all possible confidence intervals contain the true parameter value. TRUE FALSE
Question 26 1 A 95% confidence interval for the population mean is an interval estimator that:...
Question 26 1 A 95% confidence interval for the population mean is an interval estimator that: Encloses the sample mean 95% of the time on repeated sampling Encloses the population mean 95 % of the time on repeated sampling None of the above Encloses 95 % of the population on repeated sampling
Please show the process 6. In developing an interval estimate for a population mean, the population...
Please show the process
6. In developing an interval estimate for a population mean, the population standard deviation σ was assumed to be 10. The interval estimate was 50.92 2.14. Had ơ equaled 20, the interval estimate would be a. 60.92 t 2.14 b. 50.92 12.14 c. 101.84 4.28 d. 50.92t 4.28 7. If the confidence level is reduced, the confidence interval a. widens. b. remains the same. C. narrows. d. disappears. 8. The zal value for a 95% confidence...
Let's say we have constructed a 95% confidence interval estimate for a population mean. Which of...
Let's say we have constructed a 95% confidence interval estimate for a population mean. Which of the following statements would be correct? A. We expect that 95% of the intervals so constructed would contain the true population mean. B. We are 95% sure that the true population mean lies either within the constructed interval or outside the constructed interval. C. Taking 100 samples of the same size, and constructing a new confidence interval from each sample, would yield five intervals...
Find the necessary confidence interval for a population mean μ for the following values. (Round your...
Find the necessary confidence interval for a population mean μ for the following values. (Round your answers to two decimal places.) α = 0.05, n = 83, x = 66.2, s2 = 2.38 to Interpret the interval that you have constructed. There is a 95% chance that an individual sample mean will fall within the interval.There is a 5% chance that an individual sample mean will fall within the interval. In repeated sampling, 95% of all intervals constructed in this manner...
Given the confidence interval for a population mean, 55.4< < 58.6 , find the point estimate...
Given the confidence interval for a population mean, 55.4< < 58.6 , find the point estimate of . O A 1.6 OB. 57 OC. 2.8 OD. 114 E. not enough information is given to answer the question QUESTIONS We will use 800 simple random samples, each of size 30, from a given population to calculate a series of 92% confidence intervals to estimate . Approximately how many of the 800 intervals will contain the population mean? O A 700 OB....
Find a 90% confidence interval for a population mean μ for these values. (Round your answers...
Find a 90% confidence interval for a population mean μ for these values. (Round your answers to three decimal places.) (a) n = 105, x = 0.81, s2 = 0.089 (b) n = 90, x = 21.3, s2 = 3.53 (c) Interpret the intervals found in part (a) and part (b): A. There is a 10% chance that an individual sample proportion will fall within the interval. B. In repeated sampling, 90% of all intervals constructed in this manner will...
Determine the margin of error for a confidence interval to estimate the population mean with n...
Determine the margin of error for a confidence interval to estimate the population mean with n = 35 and ? = 49 for the following confidence levels. a) 91% b) 94% c) 97% a) with a 91% confidence level, the margin of error is (Round to two decimal places as needed.)
6. Interval estimation, z, t, and sample size Aa Aa Which of the following statements about the confidence interval for a population mean are true? Check all that apply. when σ is known, Χ Ζα/2ƠNn is a good interval approximation, provided the population is normally distributed when σ is unknown, x ta/2s Nn is a good interval approximation, provided the sample size is sufficiently large. when σ is known, X za/20, Vn is a good interval approximation, provided the sample...
Question 26 1 A 95% confidence interval for the population mean is an interval estimator that: Encloses the sample mean 95% of the time on repeated sampling Encloses the population mean 95 % of the time on repeated sampling None of the above Encloses 95 % of the population on repeated sampling
Please show the process
6. In developing an interval estimate for a population mean, the population standard deviation σ was assumed to be 10. The interval estimate was 50.92 2.14. Had ơ equaled 20, the interval estimate would be a. 60.92 t 2.14 b. 50.92 12.14 c. 101.84 4.28 d. 50.92t 4.28 7. If the confidence level is reduced, the confidence interval a. widens. b. remains the same. C. narrows. d. disappears. 8. The zal value for a 95% confidence...
Given the confidence interval for a population mean, 55.4< < 58.6 , find the point estimate of . O A 1.6 OB. 57 OC. 2.8 OD. 114 E. not enough information is given to answer the question QUESTIONS We will use 800 simple random samples, each of size 30, from a given population to calculate a series of 92% confidence intervals to estimate . Approximately how many of the 800 intervals will contain the population mean? O A 700 OB....
Determine the margin of error for a confidence interval to estimate the population mean with n = 35 and ? = 49 for the following confidence levels. a) 91% b) 94% c) 97% a) with a 91% confidence level, the margin of error is (Round to two decimal places as needed.)
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