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: 11 ( ):
9 10 12 14 15 11 11 12 12 13 13.
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1. 9 10 11 11 12 12 12 13 13 14 15
2.
ճ 9 10 11 12 13 14 15
ni 1 1 2 3 2 1 1
3. ().
, , :
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‑ , i , j .
= 12 11 ( 11 12 ).
4. ():
4.1 σ²
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4.2 σ² :
σ² = 30 / (11-1) = 30 / 10 = 3
5. (σ)
6. ( σ)
12 1,73 → [10,27 13,73] - 7 11
7. (V)
V = (σ / ) ×100%, V = (1,73 / 12) × 100% = 14,4%
8. (m).
:
m = σ / , N < 20 (N = 11)
m = 1,73 / = 1,73 / = 1,73 / 3,16 = 0,55
: 14,4% ‑ . , , .
Excel:
: 11 ( ):
9 10 12 14 15 11 11 12 12 13 13.
, .
:
1. B2:B12 ( ) 11 , .
2. , : 13 ; 14 ( ); 15 16 ; 17 ; 18 ( ); 19 20 . . 29 .
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. 29. 11 .
3. . 13 . , (.30).
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4. ( ) . 14 , =(2:12). ³ .32.
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5. . , . 15, = 13-14, Enter, 16 = 13+14 Enter.
6. , , ( 14) ( 13) 100%. 17, = 14 / 13*100.
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7. . 14 . . 18, = 14/((2:12)-1).
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8. . , . 19, = 13-18, Enter, 20 = 13+18 Enter.
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: 14,4% ‑ . , , .
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