🔹 Probability Examples
✅ مثال الضغط
From 50 patients, 10 have hypertension:
10/50 = 0.2 Probability = 0.2
✅ Complementary Probability: → (1–P)
If:
P(disease)=0.3 1–0.3 =0.7
Then:
P(no disease)=0.7 🔹 Correlation Values
r = +1 → Perfect positive
r = -1 → Perfect negative
r = 0 → No relation
r = -0.80 → Strong negative
r = 0.68 → Moderate to strong positive
🔹 Regression Examples
✅ Blood Pressure Equation
BP = 90 + 0.8(Weight) إذا:
Weight = 70 الحل:
90 + 0.8(70)
90 + 56 = 146 0.8 = slope
BP = 146
✅ Pain Score Equation
Pain\Score = 8-0.6(Dose)
إذا:
Dose = 5 الحل:
8 - 0.6(5)8 - 3 = 5 Dose = 5
Pain Score = 5
📌الإشارة السالبة → الألم يقل
✅ Glucose Equation
Glucose = 70 + 1.2(Age) إذا:
Age = 50 الحل:
70 + 1.2(50) 70 + 60 =130 Age = 50
Glucose = 130
🔹 Z-Test Important Numbers
Sample mean = 105
Calculated Z = 2
🔹 T-Test Important Numbers
Sample mean = 52
Degrees of freedom = 15
Calculated T = 2
Critical value = 2.13
القرار:
2 < 2.13 ➡️ Fail to reject H₀🔹 ANOVA Important Numbers
Mean of Group A = 11
Grand mean = 13
🔹 Chi-Square Important Numbers
Expected Male-Pass = 25
Calculated χ² = 4
Degrees of freedom = 1
