Math Problem Statement
Interval Tingkat Kepercayaan Diri Frekuensi 106-110 22 101-105 50 96-100 34 91-95 40 86-90 43 81-85 45 76-80 32 71-75 34 66-70 18 61-65 19 Hitung Z-score dari 95 dan 75
Solution
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Math Problem Analysis
Mathematical Concepts
Statistics
Z-Score
Mean
Standard Deviation
Formulas
Mean formula: μ = Σ(Xi * fi) / Σfi
Standard deviation formula: σ = √Σ(fi * (Xi - μ)^2) / Σfi
Z-Score formula: Z = (X - μ) / σ
Theorems
Z-Score Theorem
Suitable Grade Level
Grades 10-12
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