An article contained the following observations on degree of polymerization for paper specimens for which viscosity times concentration fell in a certain middle range: 418 421 422 423 426 427 430 435 436 439 446 447 450 452 455 462 464 Calculate a two-sided 95% confidence interval for true average degree of polymerization. (Round your answers to two decimal places

An article contained the following observations on degree of polymerization for paper specimens for which viscosity times concentration fell in a certain middle range: 418 421 422 423 426 427 430 435 436 439 446 447 450 452 455 462 464 Calculate a two-sided 95% confidence interval for true average degree of polymerization. (Round your answers to two decimal places

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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(3) Two methods were applied to measure and test the standard reference materials of chromium. Quantity Method 1 Method 2 Mean Value (ppm) Standard deviation (ppm) 0.082005 0.0826052 0.0000134 0.000129 Number of measurements Are the standard deviations significantly different? Are the mean significantly different at the 95% confidence level? (Show your Calculation)
Here are summary statistics for the weights of Pepsi in randomly selected cans: n = 36, x=0.82408 lb, s=0.00568 lb. Use a confidence level of 95% to complete parts (a) through (d) below. a. Identify the critical value ta/2 used for finding the margin of error. tx/2 = (Round to two decimal places as needed.) b. Find the margin of error. E = lb (Round to five decimal places as needed.) c. Find the confidence interval estimate of μ. lb<μ< lb (Round to five decimal places as needed.) d. Write a brief statement that interprets the confidence interval. Choose the correct answer below. C O A. One has 95% confidence that the sample mean weight of Pepsi in a can is equal to the population mean weight of Pepsi in a can. O B. Approximately 95% of sample mean weights of Pepsi in a can will fall between the lower bound and the upper bound. O C. There is a 95% chance that the true value of the population mean weight of Pepsi in a can will fall between the lower bound and the upper bound. O D. One…
omeb... Kaiser Permanent... /courses/27422/discussion_topics/357765 F2 W Instructions 30F Required parameters: Confidence level: F #3 0.95 Standard deviation: 7.9 E Number of Hours Worked An economic researcher is collecting data about grocery store employees in a county. The data listed below represents a random sample of number of hours worked by 40 employees for several grocery stores in the county. Assume that the population standard deviation is 7.9 hours. An economics researcher wants to estimate the mean number of hours worked by all grocery store employees in the county. How many employees must be included in the sample to be 95% confident that the sample mean is within 1.5 hours of the population mean? 30, 26, 33, 26, 26, 33, 31, 31, 21, 37, 27, 20, 34, 35, 30, 24, 38, 34, 39, 31, 22, 30, 23, 23, 31, 44, 31, 33, 33, 26, 27, 28, 25, 35, 23, ,32, 29, 31, 25, 27 Find the minimum sample size to estimate the population mean hours worked using StatCrunch. 1. Enter data in…
The average income of a large sample of households is $63,000 and the s.d. is $7,000. Assume that the data is approximately bell-shaped. What percent of these households have incomes between $42,000 and $77,000? Don’t forget to properly justify your answer using the empirical rule.
Here are summary statistics for randomly selected weights of newborn girls: n=36, x=3150.0 g, s=695.5 g. Use a confidence level of 99% to complete parts (a) through (d) below.
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#16 Diagnostic Tests: Uric Acid Overproduction of uric acid in the body can be an indication of cell breakdown. Over a period of months, an adult male patient has taken eight blood tests for uric acid. The mean concentration was z = 5.35 mg/dl. The distribution of uric acid in healthy males can be assumed to be normal, with o = 1.85 mg/dl. (a) Find a 95% confidence interval for the population mean concentration of uric acid in this patient's blood. What is the margin of error? (b) What conditions are necessary for your calculation? (c) Interpret your results in the context of this problem. (d) Sample Size Find the sample size (n) necessary for a 95% confidence level with maximal margin of error E = 1.10 for the mean concentration of uric acid in this patient's blood.
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