Statistiske beregninger – CITIZEN SR-135NPU User Manual
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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)