The percentage of titanium in an alloy used in aerospace castings is measured in 51 randomly selected parts. The sample standard deviation is s = 0.47. Construct a 95% two-sided confidence interval for o. Assume population is approximately normally distributed. Round your answers to 4 decimal places. Statistical Tables and Char

The percentage of titanium in an alloy used in aerospace castings is measured in 51 randomly selected parts. The sample standard deviation is s = 0.47. Construct a 95% two-sided confidence interval for o. Assume population is approximately normally distributed. Round your answers to 4 decimal places. Statistical Tables and Char

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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C. A sample of ages and weights of five women members of an aerobics class showed their weights and ages. in years to their nearest birthday: 24 Age Weight 22 18 26 20 115 159 141 137 130 ;Weight: ;Weight: ; Weight: Age: 1. Find the mean of 2. Find the standard deviation of 3. Find the coefficient of variation of 4. Which set of data is relatively more variable? Age: Age: 5. Why?
Part 1 1. In a study of ground motion caused by earthquakes, the velocity (in m/s) and the acceleration (in) were recorded for five earthquakes. The results are presented in the following table and compute the variance and standard deviation of the acceleration of these samples and explain their meaning. Velocity 1.54 1.60 0.95 Acceleration 5.64 6.04 6.04 1.3 2.92 4.37 3.00
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QUESTION 2 The data in the accompanying table were obtained from EPA 1993 Gas Mileage Guide for new automobiles. State whether each of the variables measured is quantitative (discrete or continuous) or qualitative: Estimated Estimated Engine Model Manufacture Transmissi No. of City Cylinders Miles/Gallo Miles/Gallo Highway Size Name on (liters) NSX Acura Automatic 3.0 18 23 Manual Automatic Manual Colt Dodge 1.5 4 32 40 22 22 318i BMW 1.8 4 30 Cаmry Toyota 2.2 4 30
The amount of time that a customer spends waiting at an airport check-in counter is a random variable with mean 8.0 minutes and standard deviation 1.6 minutes. Suppose that arandom sample of n = 46 customers is observed. Find the probability that the average time waiting in line for these customers is (a) Less than 10 minutes (b) Between 5 and 10 minutes (C) Less than 6 minutes Round your answers to four decimal places (eg. 0.9876). (a) The probability is i (b) The probability is i (c) The probability is Statistical Tables and Charts