Two-Sample T-Test and CI: Bunga Bagian Atas, Bunga Bagian Bawah
Two-sample T for Bunga Bagian Atas vs Bunga Bagian Bawah
N Mean StDev SE Mean
Bunga Ba 10 46.3 10.7 3.4
Bunga Ba 10 36.30 8.50 2.7
Difference = mu Bunga Bagian Atas - mu Bunga Bagian Bawah
Estimate for difference: 10.00
95% CI for difference: (0.93, 19.07)
T-Test of difference = 0 (vs not =): T-Value = 2.32 P-Value = 0.032 DF = 18
Both use Pooled StDev = 9.65
P
Kesimpulan: terdapat perbedaan nyata antara bunga bagian atas dengan bunga bagian bawah
Regression Analysis: Absorbansi versus Konsentrasi (ppm)
The regression equation is
Absorbansi = - 0.0354 + 0.182 Konsentrasi (ppm)
Predictor Coef SE Coef T P
Constant -0.03545 0.01028 -3.45 0.026
Konsentr 0.18166 0.02137 8.50 0.001
S = 0.008938 R-Sq = 94.8% R-Sq(adj) = 93.4%
Analysis of Variance
Source DF SS MS F P
Regression 1 0.0057749 0.0057749 72.28 0.001
Residual Error 4 0.0003196 0.0000799
Total 5 0.0060945
Correlations: Konsentrasi (ppm), Absorbansi
Pearson correlation of Konsentrasi (ppm) and Absorbansi = 0.973
P-Value = 0.001
Koefisien determinasi = 0.182
Koefisien Korelasi = 0.973
Kesimpulan: -Konsentrasi berpengaruh positif terhadap absorbansi
-antara konsentrasi dan absorbansi terdapat hubungan yang sangat erat
4. a)
One-way ANOVA: ulanagan, cara
Analysis of Variance
Source DF SS MS F P
Factor 1 1105.005 1105.005 1615.15 0.000
Error 22 15.051 0.684
Total 23 1120.056
Individual 95% CIs For Mean
Based on Pooled StDev
Level N Mean StDev -----+---------+---------+---------+-
ulanagan 12 2.500 1.168 (*)
cara 12 16.071 0.068 (*)
-----+---------+---------+---------+-
Pooled StDev = 0.827 4.0 8.0 12.0 16.0
Kesimpulan :
ketiga cara tersebut berbeda nyata.
b.) One-way ANOVA: cara versus ulanagan
Analysis of Variance for cara
Source DF SS MS F P
ulanagan 3 0.01109 0.00370 0.74 0.559
Error 8 0.04020 0.00502
Total 11 0.05129
Individual 95% CIs For Mean
Based on Pooled StDev
Level N Mean StDev ---------+---------+---------+-------
1 3 16.0833 0.0503 (----------*-----------)
2 3 16.1100 0.0529 (-----------*-----------)
3 3 16.0267 0.0902 (----------*-----------)
4 3 16.0633 0.0814 (-----------*-----------)
---------+---------+---------+-------
Pooled StDev = 0.0709 16.000 16.080 16.160
Dunnett's comparisons with a control
Family error rate = 0.0500
Individual error rate = 0.0205
Critical value = 2.88
Control = level (1) of ulanagan
Intervals for treatment mean minus control mean
Level Lower Center Upper ---------+---------+---------+--------
2 -0.14001 0.02667 0.19334 (-------------*-------------)
3 -0.22334 -0.05667 0.11001 (-------------*-------------)
4 -0.18668 -0.02000 0.14668 (-------------*-------------)
---------+---------+---------+--------
-0.12 0.00 0.12
| Perlakuan | 1 | 2 | 3 | 4 |
| 1 | - | TBN | TBN | TBN |
Tukey's pairwise comparisons
Family error rate = 0.0500
Individual error rate = 0.0126
Critical value = 4.53
Intervals for (column level mean) - (row level mean)
1 2 3
2 -0.21206
0.15873
3 -0.12873 -0.10206
0.24206 0.26873
4 -0.16540 -0.13873 -0.22206
0.20540 0.23206 0.14873
| Perlakuan | 1 | 2 | 3 | 4 |
| 1 | - | TBN | TBN | TBN |
| 2 | TBN | - | TBN | TBN |
| 3 | TBN | TBN | - | TBN |
| 4 | TBN | TBN | TBN | - |
Fisher's pairwise comparisons
Family error rate = 0.176
Individual error rate = 0.0500
Critical value = 2.306
Intervals for (column level mean) - (row level mean)
1 2 3
2 -0.16014
0.10680
3 -0.07680 -0.05014
0.19014 0.21680
4 -0.11347 -0.08680 -0.17014
0.15347 0.18014 0.09680
| Perlakuan | 1 | 2 | 3 | 4 |
| 1 | - | TBN | TBN | TBN |
| 2 | TBN | - | TBN | TBN |
| 3 | TBN | TBN | - | TBN |
| 4 | TBN | TBN | TBN | - |
