Use the t-distribution to find a confidence interval for a difference in means u1 – H2 given the relevant sampleresults. Give the best estimate for uj – H2, the margin of error, and the confidence interval. Assume the resultscome from random samples from populations that are approximately normally distributed.: 5.9, s1A 90% confidence interval for j – µ2 using the sample results I12.7, n22.6, n1= 10 and x24.6,S28%3DEnter the exact answer for the best estimate and round your answers for the margin of error and the confidenceinterval to two decimal places.Best estimate =Margin of error =iConfidence interval : itoi

The random variable is the difference of two population means. There are two independent samples…

Answered: Use the t-distribution to find a…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A simple random sample of 10 subjects finds that the sample mean is 56 and the standard deviation is 4. Find the 98% confidence interval for u. Display the result in interval notation. You must round your result to decimal places. Remember that the information you have is from a small sample, you must use the t distribution. Remember that critical values can be calculated in EXCEL using the degrees of freedom (n-1) and the level of significance (I - C) as a function of T.INV 2T (Level of Significance, Degrees of Freedom) Select one: a. The interval is: (53,057, 58,943) b. The range is: (53,521, 58,479). c. The interval is: (51,080, 60,920) d. The interval is: (51.991, 60.009) e. The interval is: (52,431, 59,569)
A simple random sample of 60 items resulted in a sample mean of 71. The population standard deviation is 13. a. Compute the 95% confidence interval for the population mean (to 1 decimal). Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence interval for the population mean (to 2 decimals).
Use The t Distribution Table to find the t, value for a 98% confidence interval for the mean when the sample size is 17. a/2 ta/2=
Construct the indicated confidence interval for the difference between the two population means. Assume that the two samples are independent simple random samples.Independent samples from two different populations yield the following data. x̅1 = 393, x̅2 = 703, s1 = 85, s2 = 98. The sample size is 348 for both samples. Find the 90% confidence interval for μ1 - μ2.
The ages of registered voters in Smith County are normally distributed with a population standard deviation of 3 years and an unknown population mean. A random sample of 18 voters is taken and results in a sample mean of 55 years. Find the margin of error for a 95% confidence interval for the population mean. z0.10z0.10 z0.05z0.05 z0.025z0.025 z0.01z0.01 z0.005z0.005 1.282 1.645 1.960 2.326 2.576 You may use a calculator or the common z values above. Round the final answer to two decimal places.
Use the t-distribution to find a confidence interval for a difference in means μ1-μ2 given the relevant sample results. Give the best estimate for μ1-μ2, the margin of error, and the confidence interval. Assume the results come from random samples from populations that are approximately normally distributed.A 99% confidence interval for μ1-μ2 using the sample results x¯1=507, s1=112, n1=360 and x¯2=445, s2=96, n2=200Enter the exact answer for the best estimate and round your answers for the margin of error and the confidence interval to two decimal places.Best estimate = Margin of error = Confidence interval :
Find the critical values X7p and X2, for an 80% confidence when the sample size is 51.
The average weekly salaries (in dollars) earned by teachers in 1994 are given below for five European countries. Country Weekly Salary France $1,213 Germany $1,752 Greece $824 Ireland $1,101 Italy $1,006 a) What is the range for salaries? b) What is the standard deviation of the salaries
The commute times for the workers in a city are normally distributed with an unknown population mean and standard deviation. If a random sample of 27 workers is taken and results in a sample mean of 22 minutes and sample deviation of 3 minutes, find a 95% confidence interval estimate for the population mean using the Student's t-distribution. df t0.10 t0.05 t0.025 t0.01 t0.005 ... ... ... ... ... ... 25 1.316 1.708 2.060 2.485 2.787 26 1.315 1.706 2.056 2.479 2.779 27 1.314 1.703 2.052 2.473 2.771 28 1.313 1.701 2.048 2.467 2.763
Use the given confidence interval to find the margin of error and the sample mean. (13.2,20.6) The sample mean is The margin of error is (Type an integer or a decimal ) (Type an integer or a decimal)
Find the critical value to for the confidence level c = 0.99 and sample size n = 9. tc= Click the icon to view the t-distribution table. (Round to the nearest thousandth as needed.)
A simple random sample of 44 female cottonmouths yeilded the number of young per liter. The sample mean calculated to 7.59. Assume sigma = 2.4, obtain a 95% confidence interval for the mean number of young per litter of all female eastern cottonmouths.

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