The cooling system in a nuclear submarineconsists of an assembly of welded pipesthrough which a coolant is circulated.Specifications require that weld strength mustexceed 150 psi. A random sample of 20 weldsresulted in a sample mean of 153.7 psi and asample standard deviation of 11.3 psi.Which side(s) is (are) the critical region(s)located?O left sideOright sideO both left and right sidesO neither left nor right since there is no critical region

The critical region(s) is located on the right side of the sampling distribution because we are…

Answered: The cooling system in a nuclear…

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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TF.13 The English proficiency test scores of the students from a large high school have mean μ = 76 points and standard deviation σ = 8.8 points. Let x̄ be the average salary of a random sample of 40 students. a) Find the probability that x̄ is between 72 and 80, inclusive. b) Find the probability that x̄ is at least 77.
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Assume that females have pulse rates that are normally distributed with a mean of u=75,0 beats per minute and a standard deviation of o = 12.5 beats per minute. Complete parts (a) through (c) below. ne a. If 1 adult female is randomly selected, find the probability that her pulse rate is less than 78 beats per minute. ent The probability is (Round to four decimal places as needed.) b. If 25 adult females are randomly selected, find the probability that they have pulse rates with a mean less than 78 beats per minute. The probability is (Round to four decimal places as needed.) c. Why can the normal distribution be used in part (b), even though the sample size does not exceed 30? O A. Since the distribution is of individuals, not sample means, the distribution is a normal distribution for any sample size. O B. Since the mean pulse rate exceeds 30, the distribution of sample means is a normal distribution for any sample size. OC. Since the distribution is of sample means, not individuals,…
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Consider a normal distribution curve where 70-th percentile is at 12 and the 45-th percentile is at 7. Use this information to find the mean, μ, and the standard deviation, o, of the distribution. a) με b) σ =
J A survey found that women's heights are normally distributed with mean 63.3 in. and standard deviation 2.7 in. The survey also found that men's heights are normally distributed with mean 67.5 in. and standard deviation 3.4 in. Most of the live characters employed at an amusement park have height requirements of a minimum of 57 in. and a maximum o 64 in. Complete parts (a) and (b) below. ... a. Find the percentage of men meeting the height requirement. What does the result suggest about the genders of the people who are employed as characters at the amusement park? The percentage of men who meet the height requirement is 3.8%. (Round to two decimal places as needed.) an example
Assume that the helium porosity (in percentage) of coal sample taken from any particular sean is normally distributed with a true standard deviation of 0.77 how large a sample size is necessary if the width of the 95% internal is to by 0.348 A) 75 B) 76 C) 80 D) 79
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Calculate the coefficient of variation of a distribution with: 2*f = 110 and *² · f = 1235 n = 10, %3D %3D 1.596 75.496 15.2% 25.3%
Consider a normal distribution curve where 70-th percentile is at 18 and the 35-th percentile is at 1. Use this information to find the mean, μ, and the standard deviation, o, of the distribution. a) b) o=
Assume for a moment that the distribution of weight of adult is approximately normal with a mean of 179.8 lb and a standard deviation of 93.0 lb find the probably that a randomly selected adult would have a weight at most 272.8 lb A) 0.9413 B) 0.2583 C) 0.8413 D) 0.1583

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