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(a) Find Var(X). (b) Find P(3.39 ≤X ≤ 3.6), approximately. (c) What assumptions have you made?

(a) Find Var(X). (b) Find P(3.39 ≤X ≤ 3.6), approximately. (c) What assumptions have you made?

Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015
Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015
1st Edition
ISBN:9781680331141
Author:HOUGHTON MIFFLIN HARCOURT
Publisher:HOUGHTON MIFFLIN HARCOURT
Chapter11: Data Analysis And Displays
Section: Chapter Questions
Problem 10CT
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4. Let X be the g.p.a. of a randomly chosen graduate student at CSU East Bay. Assume that E(X) = 3.5 and Var(X) = 0.03. Let X be the sample mean of n = 20 randomly selected graduate students in this class (a) Find Var(X). (b) Find P(3.39 ≤X ≤ 3.6), approximately. (c) What assumptions have you made?
Transcribed Image Text:4. Let X be the g.p.a. of a randomly chosen graduate student at CSU East Bay. Assume that E(X) = 3.5 and Var(X) = 0.03. Let X be the sample mean of n = 20 randomly selected graduate students in this class (a) Find Var(X). (b) Find P(3.39 ≤X ≤ 3.6), approximately. (c) What assumptions have you made?
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