i would use a t distribution because its a sample and its normally
distrubted, im not sure if thats correctHomework Answers
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i would use a t distribution because its a sample and its normally
distrubted, im not...
Use the t-distribution to find a confidence interval for a mean u given the relevant sample...
Use the t-distribution to find a confidence interval for a mean u given the relevant sample results. Give the best point estimate for u, the margin of error, and the confidence interval. Assume the results come from a random sample from a population that is approximately normally distributed. A 95% confidence interval for u using the sample results I = 10.5,5 = 6.9, and n = 30 Round your answer for the point estimate to one decimal place, and your...
Use the t-distribution to find a confidence interval for a mean μ given the relevant sample...
Use the t-distribution to find a confidence interval for a mean μ given the relevant sample results. Give the best point estimate for μ, the margin of error, and the confidence interval. Assume the results come from a random sample from a population that is approximately normally distributed. A 95% confidence interval for μ using the sample results x̄ = 79.7, s = 6.6, and n = 42 Round the answer for the point estimate to one decimal place, and...
In a random sample of eight cell phones, the mean full retail price was $460.00 and...
In a random sample of eight cell phones, the mean full retail price was $460.00 and the standard deviation was $173.00. Assume the population is normally distributed and use the t-distribution to find the margin of error and construct a 95% confidence interval for the population mean u. Interpret the results. Identify the margin of error. (Round to one decimal place as needed.) Construct a 95% confidence interval for the population mean. (Round to one decimal place as needed.) Interpret...
9. The amount of time that a certain cell phone will keep a charge is known...
9. The amount of time that a certain cell phone will keep a charge is known to be normally distributed with a standard deviation o= 15 hours. A sample of 45 cell phones has a mean time of 145 hours. Let u represent the population mean time that a cell phone will keep a charge. a. What is the point estimate of u? b. What is the standard error of the point estimate? Round to three decimal places. c. Suppose...
In a random sample of eleven cell phones, the mean full retail price was $460.50 and...
In a random sample of eleven cell phones, the mean full retail price was $460.50 and the standard deviation was $190.00. Assume the population is normally distributed and use the t-distribution to find the margin of error and construct a 90% confidence interval for the population mean mu. Interpret the results. Identify the margin of error.
In a random sample of eleven cell phones, the mean full retail price was $515.50 and...
In a random sample of eleven cell phones, the mean full retail price was $515.50 and the standard deviation was $212.00. Assume the population is normally distributed and use the t-distribution to find the margin of error and construct a 90% confidence interval for the population mean mu. Interpret the results.
Use the t-distribution to find a confidence interval for a mean given the relevant sample results....
Use the t-distribution to find a confidence interval for a mean given the relevant sample results. Give the best point estimate for the margin of error, and the confidence interval. Assume the results come from a random sample from a population that is approximately normally distributed A 90% confidence interval for using the sample results T = 2.9.5 = 0.3, and n = 100 Round your answer for the point estimate to one decimal place, and your answers for the...
1. (8.1) You draw a sample of size 30 from a normally distributed population with a...
1. (8.1) You draw a sample of size 30 from a normally distributed population with a standard deviation of 4. The sample mean is 41. a. If you want to construct a 95% confidence interval, how much probability will be in each tail of the distribution? b. Find the margin of error for a 95% confidence interval. c. Construct and write a statement interpreting a 95% confidence interval.
Use the t-distribution to find a confidence interval for a mean μ given the relevant sample...
Use the t-distribution to find a confidence interval for a mean μ given the relevant sample results. Give the best point estimate for μ, the margin of error, and the confidence interval. Assume the results come from a random sample from a population that is approximately normally distributed. A 90% confidence interval for μ using the sample results x¯=147.0, s=50.6, and n=50 Point estimate= 147.0 Margin of error=? The 90% confidence interval is ____to _____.
Use the t-distribution to find a confidence interval for a mean μ given the relevant sample...
Use the t-distribution to find a confidence interval for a mean μ given the relevant sample results. Give the best point estimate for μ, the margin of error, and the confidence interval. Assume the results come from a random sample from a population that is approximately normally distributed. A 99% confidence interval for μ using the sample results x¯=93.5, s=34.3, and n=15 Round your answer for the point estimate to one decimal place, and your answers for the margin of...
Use the t-distribution to find a confidence interval for a mean u given the relevant sample results. Give the best point estimate for u, the margin of error, and the confidence interval. Assume the results come from a random sample from a population that is approximately normally distributed. A 95% confidence interval for u using the sample results I = 10.5,5 = 6.9, and n = 30 Round your answer for the point estimate to one decimal place, and your...
In a random sample of eight cell phones, the mean full retail price was $460.00 and the standard deviation was $173.00. Assume the population is normally distributed and use the t-distribution to find the margin of error and construct a 95% confidence interval for the population mean u. Interpret the results. Identify the margin of error. (Round to one decimal place as needed.) Construct a 95% confidence interval for the population mean. (Round to one decimal place as needed.) Interpret...
9. The amount of time that a certain cell phone will keep a charge is known to be normally distributed with a standard deviation o= 15 hours. A sample of 45 cell phones has a mean time of 145 hours. Let u represent the population mean time that a cell phone will keep a charge. a. What is the point estimate of u? b. What is the standard error of the point estimate? Round to three decimal places. c. Suppose...
Use the t-distribution to find a confidence interval for a mean given the relevant sample results. Give the best point estimate for the margin of error, and the confidence interval. Assume the results come from a random sample from a population that is approximately normally distributed A 90% confidence interval for using the sample results T = 2.9.5 = 0.3, and n = 100 Round your answer for the point estimate to one decimal place, and your answers for the...
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