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تحميل الدليل التدريبي

أسئلة شائعة


f*x^2 f*x Min class (x) frequency(F) classes
2531.25 112.5 22.5 5 20-
18587.5 385 27.5 14 25-
11618.75 357.5 32.5 11 30-
18281.25 487.5 37.5 13 35-
7225 170 42.5 4 40-
6768.75 142.5 47.5 3 45-50
57012.5 1655 210 50 total
class range = Upper limit - lower limit = 5
Min class (x) = (lower limit + upper limit) / 2
mean (x) = (∑ fx) / (∑ f) = c9/e9 = 33.1
variance (σ²) =(∑fx²/∑f)-(∑fx/∑f)² = (b9/e9) - (c9/c9)² = 44.64
st.deviation (σ) = sqrt (b17) = 6.6813172

EXERCISE 2:

HS GPA 1 YR COLLEGE GPA
3.5 3.8
3 1.4
2.6 1.4
3.1 3.1
3.8 2.5
3.7 3.8
2 3.5
2.5 2
3.9 2.7
3.7 3.8
2.5 2.8
Column1   Column2  
Mean 3.118181818 Mean 2.8
Standard Error 0.195317076 Standard Error 0.273695
Median 3.1 Median 2.8
Mode 3.7 Mode 3.8
Standard Deviation 0.647793458 Standard Deviation 0.907744
Sample Variance 0.419636364 Sample Variance 0.824
Kurtosis -1.28503531 Kurtosis -1.10222
Skewness -0.344835897 Skewness -0.43432
Range 1.9 Range 2.4
Minimum 2 Minimum 1.4
Maximum 3.9 Maximum 3.8
Sum 34.3 Sum 30.8
Count 11 Count 11
     
  Column 1 Column 2
Column 1 1
Column 2 0.316309897 1
SUMMARY OUTPUT
Regression Statistics
Multiple R 0.316309897
R Square 0.100051951
Adjusted R Square 5.77233E-05
Standard Error 0.647774761
Observations 11
ANOVA
  df SS MS F Significance F
Regression 1 0.419854 0.419854 1.000577 0.343304
Residual 9 3.776509 0.419612
Total 10 4.196364      
  Coefficients Standard Error t Stat P-value Lower 95% Upper 95% Lower 95.0% Upper 95.0%
Intercept 2.486142983 0.661354 3.759171 0.004491 0.990056 3.98223 0.990056 3.98223
X Variable 1 0.225728155 0.225663 1.000289 0.343304 -0.28476 0.736213 -0.28476 0.736213

EXERCISE 3:

10

 

-1

3

7

12

 

4

0

2

0

 

2

-1

1

 

 

 

 

 

26

 

-0.06667

0.333333

-0.2

40

 

0

0.5

-1

8

 

0.133333

-0.16667

0.4

 
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