Math Problem Statement

data set 4.xlsx

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(b) Find the probability that their average horsepower x-bar is between 90 hp and 110 hp.

Solution

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Math Problem Analysis

Mathematical Concepts

Probability
Sampling Distribution
Z-Scores
Normal Distribution

Formulas

Sampling distribution of sample mean: x̄ ~ N(μ, σ/√n)
Z-score formula: z = (x - μ) / (σ/√n)

Theorems

Central Limit Theorem

Suitable Grade Level

College-level Statistics