Filter
Top Products
SR135_Danish_090326.doc SIZE140x75mm SCALE 2:1 2009/3/26
-Da16-
7. Statistiske beregninger
Eksempel:
(1) Hvad er gennemsnittet og standardafvigelsen?
Data: 55, 53, 57, 54, 51, 56, 55, 52
Indtastning Display Bemærkning
SD
[SHIFT] [SD] 0 vælg statistik-mode
[5] [5] [DATA] 1 vis alle
[5] [3] [DATA] 2 inputdata
[5] [7] [DATA] 3
[5] [4] [DATA] 4
[5] [1] [DATA] 5
[5] [6] [DATA] 6
[5] [5] [DATA] 7
[5] [2] [DATA] 8
[
x
]
54.125
Gennemsnit af dataene
[SHIFT] [
Σx]
433
Summen af dataene
[SHIFT] [
Σx
2
]
23465
Summen af dataenes kvadrat
[n] 8 Antal inputdata
[
σ
n–1
]
2.031009601
Stikprøvestandardafvigelse
(
σ
n–1
)
[x
2
] 4.125 Upåvirket af varians
[SHIFT] [
σ
n
]
1.899835519
Populationsstandardafvigelse
(
σ
n
)
[SHIFT] [SD] 0 Ryd statistik-mode (ryd "SD")
(2) Rettelse af data
Indtastning Display Bemærkning
SD
[SHIFT] [SD] 0 Vælg statistik-mode
[5] [0] [DATA] 1
[6] [0] [DATA] 2 Indtast de forkerte data (60)
[6] [0] [SHIFT] [DEL] 1 Ryd de forkerte data (60)
[5] [6] [DATA] 2 Indtast de rigtige data (56)
[5] [4] [x] [3] [DATA] 5 Indtast de forkerte data (54x3)
[5] [4] [x] [3] [SHIFT] [DEL] 2 Ryd de forkerte data (54x3)
[5] [8] [x] [3] [DATA] 5 Indtast de rigtige data (58x3)
[5] [2] [x] [4] [DATA] 9 Indtast de forkerte data (52x4)
[5] [5] [DATA] 10 Indtast de rigtige data (55)