Math Problem Statement
A sample of 100 clients of an exercise facility was selected. Let X = the number of days per week that a randomly selected client uses the exercise facility. X Frequency 0 2 1 12 2 33 3 29 4 11 5 9 6 4 Find the number that is 1.5 standard deviations BELOW the mean. (Round your answer to three decimal places.)
Solution
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Math Problem Analysis
Mathematical Concepts
Statistics
Standard Deviation
Mean
Formulas
Mean (μ) = Σ(X * f) / N
Variance (σ²) = Σ(f * (X - μ)²) / N
Standard Deviation (σ) = √(Variance)
1.5 Standard Deviations Below Mean = μ - 1.5 * σ
Theorems
Empirical Rule in Statistics
Suitable Grade Level
Grades 9-12
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