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College Algebra

College Algebra

10th Edition

ISBN:9781337282291

Author:Ron Larson

Publisher:Ron Larson

ChapterP: Prerequisites

SectionP.6: The Rectangular Coordinate System And Graphs

Problem 2ECP

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You want to use a random graph G(N, p) with N = 10³ to best approximate a Poisson random graph with average degree
(k) =
= 1/2. Which p would you prefer to use?
Select one:
a. p = 0.5
b. p = 0.005
P = 0.0005
d. p = 5 × 10-³
C.

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One sample of scores has a mean of M = 40 and a sample size of n = 15 scores. A second sample of scores has M = 55 and n = 40. Find the weighted mean of the two samples.
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Total plasma volume is important in determining the required plasma component in blood replacement therapy for a person undergoing surgery. Plasma volume is influenced by the overall health and physical activity of an individual. Suppose that a random sample of 50 male firefighters are tested and that they have a plasma volume sample mean of x = 37.5 ml/kg (milliliters plasma per kilogram body weight). Assume that ? = 7.20 ml/kg for the distribution of blood plasma. (d) Find the sample size necessary for a 99% confidence level with maximal margin of error E = 2.50 for the mean plasma volume in male firefighters. (Round up to the nearest whole number.) ______ male firefighters
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