Assume you are interested in the thermal conductivity for a specific iron at 100°F and 550W. You collect 45 samples and calculate the mean, x = 41.924 Btu/hr-ft-°F. Assume you know the population standard deviation for this specific iron, and conditions is σ = 0.30 Btu/hr-ft-°F. Construct a 95% confidence level around the true population mean for thermal conductivity.
Assume you are interested in the thermal conductivity for a specific iron at 100°F and 550W....
please answer my heat transfer problem thank you!! heat transfer problem a furnace wall is constructed of firrebrick 6in thick. The temperature of the wall is 1300F, and the T outside of the wall is 175 F. If the mean thermal conductivity under these conditions is 0.17 BTU/h-ft-F, what is the rate of heat loss through a 10 ft2 wall of the surface? ans. 3825 BTU/hr
Answers only is fine! Find the critical value zc necessary to form a confidence interval at the level of confidence shown below. c=0.92 Find the margin of error for the given values of c, σ, and n. c = 0.95, σ =2.4, n = 8.1 Level of Confidence. zc 90% 1.645 95% 1.96 99% 2.575 Construct the confidence interval for the population mean μ. c=0.98, x=9.5, σ=0.3, and n= 52 Construct the confidence interval for the population mean μ. c=0.95, x=16.7, σ=6.0, and n=...
Suppose you are interested in finding out how happy the students are at UNR. You design a survey that probes aspects of an individual’s emotional life, and using this survey are able to compute an accuracy index score ranging from 0 (completely miserable) to 100 (nauseatingly happy). You know that the standard deviation of the population (sigma) equals 8; however you do not know, and want to know, what the mean of the population (mu) is. Rather than give the...
You measure 40 textbooks' weights, and find they have a mean weight of 45 ounces. Assume the population standard deviation is 7.5 ounces. Based on this, construct a 95% confidence interval for the true population mean textbook weight.
You are given the sample mean and the population 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. If convenient, use technology to construct the confidence intervals. A random sample of 45 home theater systems has a mean price of $127.00. Assume the population standard deviation is $19.20. Construct a 90% confidence interval for the population mean. The 90% confidence interval...
You are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. Which interval is wider? If convenient, use technology to construct the confidence intervals. A random sample of 45 gas grills has a mean price of $648.40 Assume the population standard deviation is $56.50 The 90% confidence interval is
please show all steps and do both. if you dont do both problems please do problem 2 is more important . Problem 2. (45 Points) Cooling water available at 680F is flowing through 1 in diameter tube at a rate of 62000 lb/hr to cool 7000 lb/hr of a lube oil from 200 to 1000F. The specific heat of the lube is 0.62 Btu/lbm oF and viscosity is 5 cp, thermal conductivity is 0.067 Btu/ft-hr °F. The overall heat transfer...
Suppose you are a researcher in a hospital. You are experimenting with a new tranquilizer. You collect data from a random sample of 10 patients. The period of effectiveness of the tranquilizer for each patient (in hours) is as follows: 2.4 2.2 2.2 2.6 2.2 2 2.5 2.8 2 2.4 What is a point estimate for the population mean length of time. (Round answer to 4 decimal places) Which distribution should you use for this problem? normal distribution t-distribution What...
You work for a soft-drink company in the quality control division. You are interested in the standard deviation of one of your production lines as a measure of consistency. The product is intended to have a mean of 12 ounces, and your team would like the standard deviation to be as low as possible. You gather a random sample of 15 containers. Estimate the population standard deviation at a 95% level of confidence. 12.02, 12.17, 11.99, 12.01, 11.97, 12.09, 12.02,...
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...