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Statıstıcs I
STATISTICS I (İSTATİSTİK) - (İNGİLİZCE) Dersi Variability Measures soru cevapları
STATISTICS I (İSTATİSTİK) - (İNGİLİZCE) Dersi Variability Measures soru detayı:
SORU:
A farmer wants to collect some statistical information about the lambs he feeds and picks 10 of them. The weights of the lambs are 8,10,7,12,14,6,9,7,13 and 14 kgs. Calculate the sample mean, variance and standard deviation.
CEVAP:
We can compute it by preparing the following table
Sample mean=100/10=10kg
Variance=84/(10-1)=9.33kg
Standard Deviation=sqrt(9.33)=3.05kg
| Observation(xi) | Deviation(xi-X) | Squared Deviation (xi-X)2 | |
| 8 | -2 | 4 | |
| 10 | 0 | 0 | |
| 7 | -3 | 9 | |
| 12 | 2 | 4 | |
| 14 | 4 | 16 | |
| 6 | -4 | 16 | |
| 9 | -1 | 1 | |
| 7 | -3 | 9 | |
| 13 | 3 | 9 | |
| 14 | 4 | 16 | |
| Totals | 100 | 0 | 84 |
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