The mean replacement time for a random sample of 12 cd players is 8.6 years with...
The mean replacement time for a random sample of 12 cd players is 8.6 years with a standard deviation of 3.5 years. Construct the 98% confidence interval for the population variance σ2. Assume the data are normally distributed.
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The mean replacement time for a random sample of 12 cd players
is 8.6 years with...
please ignore/ refund question Non-players of Video Games Players of Video Games Sample size 10 15 0.52 Mean reac...
please ignore/ refund question
Non-players of Video Games Players of Video Games Sample size 10 15 0.52 Mean reaction time 0.50 (seconds) Standard deviation of reaction times (seconds) 0.02 0.01 Assume that the reaction times for both populations are normally distributed with the same population standard deviation. Construct a 98% confidence interval for the difference between the population means of reaction times. a.
Non-players of Video Games Players of Video Games Sample size 10 15 0.52 Mean reaction time 0.50...
The prices of CD players are normally distributed, with a standard deviation of $12. A random...
The prices of CD players are normally distributed, with a standard deviation of $12. A random sample of 16 CD player prices is drawn. A confidence interval for the mean price shows a $9.30 margin of error. What was the level of confidence?
2. The mean replacement time for a random sample of 18 washing machines is $.6 years...
2. The mean replacement time for a random sample of 18 washing machines is $.6 years and the standard deviation is 1.5 years. Construct a 98% confidence interval for the time of all washing machins of this typs.(use distribution for analysis).
In a random sample of 21 people, the mean commute time to work was33.9 minutes and...
In a random sample of 21 people, the mean commute time to work was33.9 minutes and the standard deviation was7.3minutes. Assume the population is normally distributed and use a t-distribution to construct a 98%confidence interval for the population mean mμ. What is the margin of error of mμ? The confidence interval for the population mean mμ is -------------- The margin of error of mμ is ----------------- Interpret the results. A. With 98% confidence, it can be said that the commute...
In a random sample of 25 people, the mean commute time to work was 32.9 minutes and the standard deviation was 7.1 minutes
In a random sample of 25 people, the mean commute time to work was 32.9 minutes and the standard deviation was 7.1 minutes. Assume the population is normally distributed and use a t-distribution to construct a 98% confidence interval for the population mean μ: What is the margin of error of μ? Interpret the results. The confidence interval for the population mean μ is _______ The margin of error of μ is _______ Interpret the results A. If a large sample of people are...
In a random sample of 26 people, the mean commute time to work was 34.8 minutes and the standard deviation was 7.3 minutes
In a random sample of 26 people, the mean commute time to work was 34.8 minutes and the standard deviation was 7.3 minutes. Assume the population is normally distributed and use a t-distribution to construct a 98% confidence interval for the population mean μ. What is the margin of error of μ? Interpret the results. The confidence interval for the population mean μ is _______ . (Round to one decimal place as needed.) The margin of error of μ is _______ (Round to...
In a random sample of 8 people, the mean commute time to work was 33.5 minutes...
In a random sample of 8 people, the mean commute time to work was 33.5 minutes and the standard deviation was 7.4 minutes. A 98% confidence interval using thet-distribution was calculated to be (25.7,41.3). After researching commute times to work, it was found that the population standard deviation is 8.6 minutes. Find the margin of error and construct a 98% confidence interval using the standard normal distribution with the appropriate calculations for a standard deviation that is known. Compare the...
A random sample of 49 observations is used to estimate the population variance. The sample mean a...
A random sample of 49 observations is used to estimate the population variance. The sample mean and sample standard deviation are calculated as 59 and 3.1, respectively. Assume that the population is normally distributed. (You may find it useful to reference the appropriate table: chi-square table or F table) a. Construct the 90% interval estimate for the population variance. (Round intermediate calculations to at least 4 decimal places and final answers to 2 decimal places.) Confidence interval b. Construct the...
The annual earnings of 12 randomly selected computer software engineers have a sample standard deviation of $ 3626 Assum...
The annual earnings of 12 randomly selected computer software engineers have a sample standard deviation of $ 3626 Assume the sample is from a normally distributed population. Construct a confidence interval for the population variance sigma squared σ2 and the population standard deviation sigma σ. Use a 95% level of confidence. Interpret the results. What is the confidence interval for the population variance sigma squared σ2? What is the confidence interval for the population standard deviation sigma σ? Please show...
In a random sample of 17 people, the mean commute time to work was 32.2 minutes...
In a random sample of 17 people, the mean commute time to work was 32.2 minutes and the standard deviation was 7.3 minutes. Assume the population is normally distributed and use a t-distribution to construct a 99% confidence interval for the population mean mu. What is the margin of error of mu? Interpret the results.
please ignore/ refund question
Non-players of Video Games Players of Video Games Sample size 10 15 0.52 Mean reaction time 0.50 (seconds) Standard deviation of reaction times (seconds) 0.02 0.01 Assume that the reaction times for both populations are normally distributed with the same population standard deviation. Construct a 98% confidence interval for the difference between the population means of reaction times. a.
Non-players of Video Games Players of Video Games Sample size 10 15 0.52 Mean reaction time 0.50...
2. The mean replacement time for a random sample of 18 washing machines is $.6 years and the standard deviation is 1.5 years. Construct a 98% confidence interval for the time of all washing machins of this typs.(use distribution for analysis).
A random sample of 49 observations is used to estimate the population variance. The sample mean and sample standard deviation are calculated as 59 and 3.1, respectively. Assume that the population is normally distributed. (You may find it useful to reference the appropriate table: chi-square table or F table) a. Construct the 90% interval estimate for the population variance. (Round intermediate calculations to at least 4 decimal places and final answers to 2 decimal places.) Confidence interval b. Construct the...
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