Math Problem Statement
Samples are drawn from a population with mean 137 and standard deviation 40. Each sample has 238 randomly and independently chosen elements.
Use the Central Limit Theorem to estimate the probability that a sample mean is between 135 and 139.
Write your answer as a decimal rounded to the nearest thousandth.
Solution
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Math Problem Analysis
Mathematical Concepts
Central Limit Theorem
Standard Normal Distribution
Z-Scores
Probability
Formulas
Standard Error of the Mean: SE = σ / √n
Z-Score: z = (x - μ) / SE
Probability of interval: P(a ≤ x ≤ b) = P(z ≤ z_b) - P(z ≤ z_a)
Theorems
Central Limit Theorem
Suitable Grade Level
College/University Level (Introductory Statistics)
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